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- Answered
- Review
- Question 1 of 109
1. Question
Category: NCERTConsider the following statements regarding the Nebular Hypothesis:
1. The hypothesis considered that the planets were formed out of a cloud of material associated with a youthful sun, which was slowly rotating.
2. Otto Schmidt was the major proponent of Nebular Hypothesis.
Which of the above statements is/are incorrect?CorrectMathematician Laplace propounded a hypothesis regarding the origin of the earth in 1796, popularly known as Nebular Hypothesis.
The hypothesis considered that the planets were formed out of a cloud of material associated with a youthful sun, which was slowly rotating.IncorrectMathematician Laplace propounded a hypothesis regarding the origin of the earth in 1796, popularly known as Nebular Hypothesis.
The hypothesis considered that the planets were formed out of a cloud of material associated with a youthful sun, which was slowly rotating. - Question 2 of 109
2. Question
Category: NCERTConsider the following statements regarding the Big Bang Theory:
1. Sir James Jeans and Sir Harold Jeffrey provided the evidence of the Big Bang theory.
2. The theory is also called as expanding universe hypothesis.
Which of the above statements is/are correct?CorrectEdwin Hubble in 1920, provided evidence that the universe is expanding by propounding the Big Bang Theory.
The most popular argument regarding the origin of the universe is the Big Bang Theory. It is also called expanding universe hypothesis.
As time passes, galaxies move further and further apart. Similarly, the distance between the galaxies is also found to be increasing and thereby, the universe is considered to be expanding.IncorrectEdwin Hubble in 1920, provided evidence that the universe is expanding by propounding the Big Bang Theory.
The most popular argument regarding the origin of the universe is the Big Bang Theory. It is also called expanding universe hypothesis.
As time passes, galaxies move further and further apart. Similarly, the distance between the galaxies is also found to be increasing and thereby, the universe is considered to be expanding. - Question 3 of 109
3. Question
Category: NCERTConsider the following statements regarding Terrestrial Planets:
1. They have a thick atmosphere, mostly of helium and hydrogen.
2. They are made up of rock and metals and have relatively high densities.
Which of the above statements is/are incorrect?CorrectJovian (and not terrestrial planets) have a thick atmosphere, mostly of helium and hydrogen. Terrestrial planets are made up of rock and metals and have relatively high densities.
IncorrectJovian (and not terrestrial planets) have a thick atmosphere, mostly of helium and hydrogen. Terrestrial planets are made up of rock and metals and have relatively high densities.
- Question 4 of 109
4. Question
Category: NCERTWhich of the following conditions correctly differentiates between the Terrestrial and the Jovian planets?
1. The Jovian Planets were formed in the close vicinity of the parent star whereas Terrestrial Planets were formed at quite a distant location.
2. The terrestrial planets are bigger than Jovian planets.CorrectThe terrestrial planets were formed in the close vicinity of the parent star whereas Jovian planets were formed at quite a distant location. The terrestrial planets are smaller than Jovian planets.
IncorrectThe terrestrial planets were formed in the close vicinity of the parent star whereas Jovian planets were formed at quite a distant location. The terrestrial planets are smaller than Jovian planets.
- Question 5 of 109
5. Question
Category: NCERT‘The Big Splat’ theory describes the formation of the:
CorrectThe Big Splat theory describes the formation of the Moon. It is now generally believed that the formation of the moon, as a satellite of the earth, is an outcome of ‘giant impact’ or what is described as “the big splat”.
IncorrectThe Big Splat theory describes the formation of the Moon. It is now generally believed that the formation of the moon, as a satellite of the earth, is an outcome of ‘giant impact’ or what is described as “the big splat”.
- Question 6 of 109
6. Question
Category: NCERTConsider the following description:
“In 1900, a theory of the origin of the earth was developed. It considered that a wandering star approached the sun. As a result, a cigar-shaped extension of the material was separated from the solar surface. As the passing star moved away, the material separated from the solar surface continued to revolve around the sun and it slowly condensed into planets.”
Which of the following theories is discussed in the above-given passage?CorrectIn 1900, Chamberlain and Moulton considered that a wandering star approached the sun. As a result, a cigar-shaped extension of the material was separated from the solar surface. As the passing star moved away, the material separated from the solar surface continued to revolve around the sun and it slowly condensed into planets.
IncorrectIn 1900, Chamberlain and Moulton considered that a wandering star approached the sun. As a result, a cigar-shaped extension of the material was separated from the solar surface. As the passing star moved away, the material separated from the solar surface continued to revolve around the sun and it slowly condensed into planets.
- Question 7 of 109
7. Question
Category: NCERTConsider the following statements with respect to the evolution of lithosphere:
1. It is through the process of differentiation that the earth forming material got separated into different layers.
2. From the crust to the core, the density of the material decreases.
Which of the above statements is/are correct?CorrectFrom the crust to the core,the density of the material increases. During the formation of the moon, due to the giant impact, the earth was further heated up. It is through the process of differentiation that the earth forming material got separated into different layers.
IncorrectFrom the crust to the core,the density of the material increases. During the formation of the moon, due to the giant impact, the earth was further heated up. It is through the process of differentiation that the earth forming material got separated into different layers.
- Question 8 of 109
8. Question
Category: NCERTWhich of the following best explains the concept of ‘DEGASSING’?
CorrectThe process through which the gases were out poured from the interior is called degassing.
IncorrectThe process through which the gases were out poured from the interior is called degassing.
- Question 9 of 109
9. Question
Category: NCERTConsider the following statements regarding the evolution of atmosphere:
1. The early atmosphere largely contained water vapour, nitrogen, carbon dioxide, methane, ammonia and very little of free oxygen.
2. Water vapour in the atmosphere was a result of volcanic eruptions.
Which of the above statements is/are correct?CorrectThe early atmosphere largely contained water vapour, nitrogen, carbon dioxide, methane, ammonia and very little of free oxygen. Continuous volcanic eruptions contributed water and gases to the atmosphere. As the earth cooled, the water vapour released started getting condensed.
IncorrectThe early atmosphere largely contained water vapour, nitrogen, carbon dioxide, methane, ammonia and very little of free oxygen. Continuous volcanic eruptions contributed water and gases to the atmosphere. As the earth cooled, the water vapour released started getting condensed.
- Question 10 of 109
10. Question
Category: NCERTArrange the following stages of the evolution of the earth’s atmosphere in chronological order:
1. Process of photosynthesis
2. Loss of primordial atmosphere
3. Hot gases outpoured from the interior
Select the correct answer using the code given below:CorrectThe correct chronology in the Stages in the Evolution of atmosphere is:
Loss of the primordial atmosphere
Hot gases outpoured from the interior
Process of photosynthesisIncorrectThe correct chronology in the Stages in the Evolution of atmosphere is:
Loss of the primordial atmosphere
Hot gases outpoured from the interior
Process of photosynthesis - Question 11 of 109
11. Question
Category: NCERTConsider the following statements regarding Interior of the Earth:
1. The density of mantle is higher than the outer core.
2. Core of the earth is considered the main source of magma.
Which of the above statements is/are correct?CorrectThe portion of the interior earth beyond the crust is called the mantle. It has a density higher than the crust (3.4 g/cm). But its density is less than that of outer core. Density, in general, increases as we move towards interior of the earth.
The outer core is in liquid state while the inner core is in solid state. The density of material at the mantle core boundary is around 5 g/cm3. Mantle of the earth is considered the main source of magma that has been released out in the recent past.
IncorrectThe portion of the interior earth beyond the crust is called the mantle. It has a density higher than the crust (3.4 g/cm). But its density is less than that of outer core. Density, in general, increases as we move towards interior of the earth.
The outer core is in liquid state while the inner core is in solid state. The density of material at the mantle core boundary is around 5 g/cm3. Mantle of the earth is considered the main source of magma that has been released out in the recent past.
- Question 12 of 109
12. Question
Category: NCERTTwo places situated on the same isogonic line in a world map, will have the same:
CorrectIsogonic lines are lines on the Earth’s surface, used for magnetic declination, along which the declination has the same constant value, and lines along which the declination is zero are called agonic lines.
IncorrectIsogonic lines are lines on the Earth’s surface, used for magnetic declination, along which the declination has the same constant value, and lines along which the declination is zero are called agonic lines.
- Question 13 of 109
13. Question
Category: NCERTConsider the following statements:
1. Direct rays of the sun fall on the equator on 21st June.
2. Winter solstice is seen in the Southern hemisphere on 21st December.
Which of the above statements is/are correct?CorrectThe direct sun rays on equator falls during Equinox which is on March 21st and September 21st. Summer solstice refers to direct rays of sun on Tropic of cancer on June 21st and similarly, Winter Solstice falls on December 21st when sun rays are direct of Tropic of Capricorn.
IncorrectThe direct sun rays on equator falls during Equinox which is on March 21st and September 21st. Summer solstice refers to direct rays of sun on Tropic of cancer on June 21st and similarly, Winter Solstice falls on December 21st when sun rays are direct of Tropic of Capricorn.
- Question 14 of 109
14. Question
Category: NCERTGreenwich Mean Time (GMT) is the time measured on the earth’s zero-degree line of longitude or meridian. Through which of the following countries does this ‘GMT’ line passes?
1. France
2. Spain
3. Algeria
4. Niger
Select the correct answer using the code given below:CorrectIn the Northern Hemisphere, the Prime Meridian passes through the UK, France and Spain in Europe and Algeria, Mali, Burkina, Faso, Tongo and Ghana in Africa. The only landmass crossed by the Meridian in the Southern Hemisphere is Antarctica.
IncorrectIn the Northern Hemisphere, the Prime Meridian passes through the UK, France and Spain in Europe and Algeria, Mali, Burkina, Faso, Tongo and Ghana in Africa. The only landmass crossed by the Meridian in the Southern Hemisphere is Antarctica.
- Question 15 of 109
15. Question
Category: NCERTConsider the following statements regarding the interior structure of the earth:
1. The outer core is in solid state while the inner core is in liquid state.
2. The upper portion of the mantle is called asthenosphere.
Which of the above statements is/are correct?CorrectCrust is the outermost solid part of the earth. It is brittle in nature. Oceanic crust is thinner as compared to the continental crust.
The portion of the interior beyond the crust is called the mantle. The upper portion of the mantle is called asthenosphere.The outer core is in liquid state while the inner core is in solid state. The core is made up of very heavy material mostly constituted by nickel and iron. It is sometimes referred to as the NiFe layer.
IncorrectCrust is the outermost solid part of the earth. It is brittle in nature. Oceanic crust is thinner as compared to the continental crust.
The portion of the interior beyond the crust is called the mantle. The upper portion of the mantle is called asthenosphere.The outer core is in liquid state while the inner core is in solid state. The core is made up of very heavy material mostly constituted by nickel and iron. It is sometimes referred to as the NiFe layer.
- Question 16 of 109
16. Question
Category: NCERTWhat is asthenosphere?
CorrectAsthenosphere is the zone of Earth’s mantle lying beneath the lithosphere and believed to be much hotter and more fluid than the lithosphere.
IncorrectAsthenosphere is the zone of Earth’s mantle lying beneath the lithosphere and believed to be much hotter and more fluid than the lithosphere.
- Question 17 of 109
17. Question
Category: NCERTConsider the following pairs of discontinuities and its location between the layers of earth:
1. Moho Discontinuity: Mantle – Core
2. Lehmann Discontinuity: Crust – Mantle
3. Repetti Discontinuity: Outer core – Inner core
4. Guttensberg Discontinuity: Upper Mantle –Lower MantleCorrectConrad Discontinuity: Transition zone between SIAL and SIMA.
Mohorovicic Discontinuity: Transition zone be- tween the Crust and Mantle.
Repiti Discontinuity: Transition zone between Outer mantle and Inner mantle.
Gutenberg Discontinuity: Transition zone between Mantle and Core.
Lehman Discontinuity: Transition zone between Outer core and Inner core.IncorrectConrad Discontinuity: Transition zone between SIAL and SIMA.
Mohorovicic Discontinuity: Transition zone be- tween the Crust and Mantle.
Repiti Discontinuity: Transition zone between Outer mantle and Inner mantle.
Gutenberg Discontinuity: Transition zone between Mantle and Core.
Lehman Discontinuity: Transition zone between Outer core and Inner core. - Question 18 of 109
18. Question
Category: NCERTConsider the following about the interior of the earth:
1. Volcanic eruptions are indirect source of information about the interior of the earth.
2. Earthquakes are indirect source of information about the interior of the earth.
Which of the above statements is/are correct?CorrectVolcanic eruption forms source of obtaining direct information. As and when the molten material (magma) is thrown onto the surface of the earth, during volcanic eruption it becomes available for laboratory analysis.
The study of seismic waves generated during earthquake provides a complete picture of the layered interior.IncorrectVolcanic eruption forms source of obtaining direct information. As and when the molten material (magma) is thrown onto the surface of the earth, during volcanic eruption it becomes available for laboratory analysis.
The study of seismic waves generated during earthquake provides a complete picture of the layered interior. - Question 19 of 109
19. Question
Category: NCERTThe most explosive of the earth’s volcanic eruptions are known as:
CorrectCalderas are the most explosive of the earth’s volcanoes. They are usually so explosive that when they erupt, they tend to collapse on themselves rather than building any tall structure. The collapsed depressions are called calderas. Their explosiveness indicates that the magma chamber supplying the lava is not only huge but is also in close vicinity.
IncorrectCalderas are the most explosive of the earth’s volcanoes. They are usually so explosive that when they erupt, they tend to collapse on themselves rather than building any tall structure. The collapsed depressions are called calderas. Their explosiveness indicates that the magma chamber supplying the lava is not only huge but is also in close vicinity.
- Question 20 of 109
20. Question
Category: NCERTMatch the following:
Types of minerals Name of the minerals
A. Non-metallic 1. Kyanite
B. Metallic 2. Gypsum
C. Refractory 3. Asbestos
D. Fertilizer 4. Wolfram
Select the correct answer using the code given below:
A B C DCorrectTypes of minerals Name of the minerals
A. Non-metallic 2. Gypsum
B. Metallic 4. Wolfram
C. Refractory 1. Kyanite
D. Fertilizer 3. AsbestosIncorrectTypes of minerals Name of the minerals
A. Non-metallic 2. Gypsum
B. Metallic 4. Wolfram
C. Refractory 1. Kyanite
D. Fertilizer 3. Asbestos - Question 21 of 109
21. Question
Category: NCERTArrange the following elements in the ascending order on the basis of their proportion in the composition of earth’s crust:
1. Iron
2. Silicon
3. Oxygen
4. Nitrogen
Select the correct answer using the code given below:CorrectMajor Elements of the Earth’s Crust
Elements By Weight (%)
1. Oxygen 46.60
2. Silicon 27.72
3. Aluminium 8.13
4. Iron 5.00
5. Calcium 3.63
6. Sodium 2.83
7. Potassium 2.59
8. Magnesium 2.09
9. Others 1.41IncorrectMajor Elements of the Earth’s Crust
Elements By Weight (%)
1. Oxygen 46.60
2. Silicon 27.72
3. Aluminium 8.13
4. Iron 5.00
5. Calcium 3.63
6. Sodium 2.83
7. Potassium 2.59
8. Magnesium 2.09
9. Others 1.41 - Question 22 of 109
22. Question
Category: NCERTHow is Feldspar different from Pyroxene?
1. Pyroxene has larger share than the Feldspar in the composition of earth’s crust.
2. Pyroxene is green or black in colour, while Feldspar is light cream or salmon pink in colour.
Select the correct answer using the code given below:CorrectFeldspar has light cream to salmon pink colour and used in ceramics and glassmaking. Feldspar is present in half of the earth’s crust.
Pyroxene consists of calcium, aluminium, magnesium, iron, and silica. Pyroxene forms 10 percent of the earth’s crust. It is commonly found in meteorites. It is green or black in colour.
IncorrectFeldspar has light cream to salmon pink colour and used in ceramics and glassmaking. Feldspar is present in half of the earth’s crust.
Pyroxene consists of calcium, aluminium, magnesium, iron, and silica. Pyroxene forms 10 percent of the earth’s crust. It is commonly found in meteorites. It is green or black in colour.
- Question 23 of 109
23. Question
Category: NCERTWhich one of the following is not a single element mineral?
CorrectMica is not a single element mineral. It is made up of elements like potassium, aluminium, magnesium, iron, silicon, etc.
IncorrectMica is not a single element mineral. It is made up of elements like potassium, aluminium, magnesium, iron, silicon, etc.
- Question 24 of 109
24. Question
Category: NCERTMatch the following:
Minerals Rock Source
A. Quartz 1. Sand and granite
B. Mica 2. Basaltic Rocks
C. Olivine 3. Igneous and Metamorphic
Select the correct answer using the code given below:
A B CCorrectQuartz is one of the most important components of sand and granite. It consists of silica. It is a hard mineral virtually insoluble in water. It is white or colourless and used in radio and radar.
Mica comprises of potassium, aluminium, magnesium, iron, silica etc. It forms 4 per cent of the earth’s crust. It is commonly found in igneous and metamorphic rocks. It is used in electrical instruments.
Magnesium, iron and silica are major elements of olivine. It is used in jewellery. It is usually a greenish crystal, often found in basaltic rocks.
IncorrectQuartz is one of the most important components of sand and granite. It consists of silica. It is a hard mineral virtually insoluble in water. It is white or colourless and used in radio and radar.
Mica comprises of potassium, aluminium, magnesium, iron, silica etc. It forms 4 per cent of the earth’s crust. It is commonly found in igneous and metamorphic rocks. It is used in electrical instruments.
Magnesium, iron and silica are major elements of olivine. It is used in jewellery. It is usually a greenish crystal, often found in basaltic rocks.
- Question 25 of 109
25. Question
Category: NCERTConsider the following statements about metallic and non-metallic minerals:
1. Metallic minerals contain metal content while non-metallic minerals contain less metals content.
2. Cement is a metallic mineral as it contains iron particles.
Which of the above statements is/are correct?CorrectMetallic Minerals contain metal content.
IncorrectMetallic Minerals contain metal content.
- Question 26 of 109
26. Question
Category: NCERTMatch the following:
Rock Type Example
A. Clastic 1. Granite
B. Extrusive 2. Conglomerate
C. Metamorphic 3. Gneiss
D. Plutonic 4. Tuff
Select the correct answer using the code given below:
A B C DCorrectRock Type
A. Clastic 2. Conglomerate
B. Extrusive 1. Tuff
C. Metamorphic 3. Gneiss
D. Plutonic 4. GraniteIncorrectRock Type
A. Clastic 2. Conglomerate
B. Extrusive 1. Tuff
C. Metamorphic 3. Gneiss
D. Plutonic 4. Granite - Question 27 of 109
27. Question
Category: NCERTWhich of the following statements is/are correct about the igneous rocks?
1. It is formed through the cooling and solidification of magma or lava
2. Limestone is an example of igneous rock.
Select the correct answer using the code given below:CorrectIgneous rocks are formed through the cooling and solidification of magma or lava such as granite and diorite.
Sedimentary rocks are derived from the process of deposition and solidification of sediments after the process of denudation. For instance; Sandstone, limestone and chalk rock salts, gypsum or calcium sulphate, etc.
Metamorphic Rocks: Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means “change in form”. Gneiss, phyllite, slate, schist, marble, quartzite, etc., belongs to the category of metamorphic rocks.
IncorrectIgneous rocks are formed through the cooling and solidification of magma or lava such as granite and diorite.
Sedimentary rocks are derived from the process of deposition and solidification of sediments after the process of denudation. For instance; Sandstone, limestone and chalk rock salts, gypsum or calcium sulphate, etc.
Metamorphic Rocks: Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means “change in form”. Gneiss, phyllite, slate, schist, marble, quartzite, etc., belongs to the category of metamorphic rocks.
- Question 28 of 109
28. Question
Category: NCERTWhich of the following statements is/are correct regarding Igneous Rocks?
1. The process of cooling and solidification of magma happens either in the earth’s crust or on the surface of the earth.
2. Gabbro, breccia, and tuff are some of the examples of the igneous rocks.
Select the correct answer using the code given below:CorrectAs igneous rocks form out of magma and lava from the interior of the earth, they are known as primary rocks. The igneous rocks (Ignis – in Latin means ‘Fire’) are formed when magma cools in its upward movement and turns into a solid form. Granite, gabbro, pegmatite, basalt, volcanic breccia, and tuff are some of the examples of igneous rocks.
IncorrectAs igneous rocks form out of magma and lava from the interior of the earth, they are known as primary rocks. The igneous rocks (Ignis – in Latin means ‘Fire’) are formed when magma cools in its upward movement and turns into a solid form. Granite, gabbro, pegmatite, basalt, volcanic breccia, and tuff are some of the examples of igneous rocks.
- Question 29 of 109
29. Question
Category: NCERTIn the process of converting unconsolidated sediments into sedimentary rocks, which of the following processes it goes through?
1. Compaction
2. Re-crystallization
3. Cementation
4. Weathering
Select the correct answer using the code below:CorrectThe process of converting unconsolidated sediment into consolidated sedimentary rock is known as diagenesis or alternatively lithification. This process involves compaction and squeezing as the sediments become buried. Diagenesis also involves cementing of the individual grains together as water is either evaporated or squeezed out of the primary pore spaces.
IncorrectThe process of converting unconsolidated sediment into consolidated sedimentary rock is known as diagenesis or alternatively lithification. This process involves compaction and squeezing as the sediments become buried. Diagenesis also involves cementing of the individual grains together as water is either evaporated or squeezed out of the primary pore spaces.
- Question 30 of 109
30. Question
Category: NCERTMatch the following:
Rock Sedimentary Type
A. Potash 1. Chemically Formed
B. Shale 2. Mechanically Formed
C. Chalk 3. Organically Formed
Select the correct answer using the code given below:
A B CCorrectDepending upon the mode of formation, sedimentary rocks are classified into three major groups:
Mechanically formed— Sandstone, conglomerate, limestone, shale, loess etc. are examples;
Organically formed— Geyserite, chalk, limestone, coal etc. are some examples;
Chemically formed— Chert, limestone, halite, potash etc. are some examples.IncorrectDepending upon the mode of formation, sedimentary rocks are classified into three major groups:
Mechanically formed— Sandstone, conglomerate, limestone, shale, loess etc. are examples;
Organically formed— Geyserite, chalk, limestone, coal etc. are some examples;
Chemically formed— Chert, limestone, halite, potash etc. are some examples. - Question 31 of 109
31. Question
Category: NCERTMinerals are deposited and accumulated in which of the following?
CorrectSedimentary Rocks These rocks are formed by successive deposition of sediments. The process of successive deposition and formation of sedimentary rocks is called as Lithification. Due to successive depositions, they have a layered or stratified structure and hence are also called as Stratified Rocks.
IncorrectSedimentary Rocks These rocks are formed by successive deposition of sediments. The process of successive deposition and formation of sedimentary rocks is called as Lithification. Due to successive depositions, they have a layered or stratified structure and hence are also called as Stratified Rocks.
- Question 32 of 109
32. Question
Category: NCERTWhich of the following pairs is/are correctly matched?
Rock Formation
1. Igneous A. Solidification from magma and lava
2. Sedimentary B. Deposition of fragments of rocks by exogenous processes.
3. Metamorphic C. Recrystallization of existing rocks
Select the correct answer using the code given below:CorrectIncorrect - Question 33 of 109
33. Question
Category: NCERTConsider the following statements about metamorphic rocks:
1. Recrystallisation and reorganisation of materials within original rocks form metamorphic rocks.
2. Shale is an example of metamorphic rocks.
Which of the above statements is/are correct?CorrectMetamorphism is a process by which already consolidated rocks undergo recrystallisation and reorganisation of materials within original rocks.
Gneissoid, granite, syenite, slate, schist, marble, quartzite etc. are some examples of metamorphic rocks. Shale is an example of Sedimentary rocks.IncorrectMetamorphism is a process by which already consolidated rocks undergo recrystallisation and reorganisation of materials within original rocks.
Gneissoid, granite, syenite, slate, schist, marble, quartzite etc. are some examples of metamorphic rocks. Shale is an example of Sedimentary rocks. - Question 34 of 109
34. Question
Category: NCERTWhich of the following statements is/are correct about the rock cycle?
1. Igneous rocks are primary rocks and other rocks form from these primary rocks.
2. The crustal rocks once formed may be carried down into the mantle through subduction process.
Which of the above statements is/are correct?CorrectRock cycle is a continuous process through which old rocks are transformed into new ones. Igneous rocks are primary rocks and other rocks (sedimentary and metamorphic) form from these primary rocks.
IncorrectRock cycle is a continuous process through which old rocks are transformed into new ones. Igneous rocks are primary rocks and other rocks (sedimentary and metamorphic) form from these primary rocks.
- Question 35 of 109
35. Question
Category: NCERTConsider the following statements regarding exogenic geomorphic processes:
1. They obtain their energy from the gradients generated by tectonic factors.
2. Weathering, transportation, and erosion are examples of exogenic processes.
Which of the above statements is/are correct?CorrectThe exogenic processes obtain their energy from the gradients generated by tectonic factors, processes, their corresponding driving forces and atmosphere determined by the energy from the sun.
IncorrectThe exogenic processes obtain their energy from the gradients generated by tectonic factors, processes, their corresponding driving forces and atmosphere determined by the energy from the sun.
- Question 36 of 109
36. Question
Category: NCERTConsider the following statements regarding endogenic processes:
1. The energy emanating from within the earth is the main force behind endogenic geomorphic processes.
2. This energy is generated by radioactivity, rotational and tidal friction and primordial heat from the origin of the earth.
Which of the above statements is/are correct?CorrectThe energy emanating from within the earth is the main force behind endogenic geomorphic processes. This energy is mostly generated by radioactivity, rotational and tidal friction and primordial heat from the origin of the earth.
IncorrectThe energy emanating from within the earth is the main force behind endogenic geomorphic processes. This energy is mostly generated by radioactivity, rotational and tidal friction and primordial heat from the origin of the earth.
- Question 37 of 109
37. Question
Category: NCERTMatch the following:
Term Definition
A. Lithification 1. Arrangement of minerals into thin to thick layers appearing in light and dark shades
B. Foliation 2. Turning of fragments into rocks through compaction
C. Banding 3. Arrangement of minerals in layers in metamorphic rocks
Select the correct answer using the code given below
A B CCorrectTerm Definition
A. Lithification 2. Turning of fragments into rocks through compaction
B. Foliation 3. Arrangement of minerals in layers in metamorphic rocks
C. Banding 1. Arrangement of minerals into thin to thick layers appearing in light and dark shadesIncorrectTerm Definition
A. Lithification 2. Turning of fragments into rocks through compaction
B. Foliation 3. Arrangement of minerals in layers in metamorphic rocks
C. Banding 1. Arrangement of minerals into thin to thick layers appearing in light and dark shades - Question 38 of 109
38. Question
Category: NCERTConsider the following statements regarding the endogenic processes:
1. Epeirogenic processes involve mountain building through severe folding and affecting long and narrow belts of the earth’s crust
2. Orogenic processes involve uplift or warping of large parts of earth’s crust.
Which of the above statements is/are correct?CorrectOrogenic Processes includes mountain building through severe folding and faulting affecting long and narrow belts of the crust of Earth. It is a mountain building process.
Epeirogenic processes involve the uplift or warping of large parts of the crust of the earth. It is a continental building process.
IncorrectOrogenic Processes includes mountain building through severe folding and faulting affecting long and narrow belts of the crust of Earth. It is a mountain building process.
Epeirogenic processes involve the uplift or warping of large parts of the crust of the earth. It is a continental building process.
- Question 39 of 109
39. Question
Category: NCERTPhysical and Mechanical weathering processes depend on:
1. Gravitational forces such as overburden pressure, load and shearing stress
2. Expansion forces due to temperature changes, crystal growth or animal activity
3. Water pressures controlled by wetting and drying cycles.
Which of the above statements are correct?CorrectPhysical or mechanical weathering processes depend on applied forces.
IncorrectPhysical or mechanical weathering processes depend on applied forces.
- Question 40 of 109
40. Question
Category: NCERTConsider the following statements regarding weathering:
1. It is the mechanical disintegration and chemical decomposition of rocks.
2. It is an ex-situ process.
Which of the above statements is/are correct?CorrectWeathering is the action of components of weather and climate materials over Earth. As very little or no motion of materials takes place in weathering, it is an in-situ or on-site process.
IncorrectWeathering is the action of components of weather and climate materials over Earth. As very little or no motion of materials takes place in weathering, it is an in-situ or on-site process.
- Question 41 of 109
41. Question
Category: NCERTWhich of the following forces are responsible for physical weathering?
1. Gravitational force
2. Expansion force due to temperature variation
3. Water pressure
4. Radioactivity
Select the correct answer using the code given below:CorrectPhysical or mechanical weathering processes are influenced by some applied forces.
IncorrectPhysical or mechanical weathering processes are influenced by some applied forces.
- Question 42 of 109
42. Question
Category: NCERTConsider the following pairs regarding the effects of weathering and their results or regions they are associated with:
Effects of Weathering Result
1. Unloading and Expansion Exfoliation domes
2. Salt weathering Granular foliation
3. Frost wedging Glacial regions
Which of the above statements are correct?CorrectEffects of Weathering Result
1. Unloading and Expansion Exfoliation domes
2. Salt weathering Granular foliation
3. Frost wedging Glacial regionsIncorrectEffects of Weathering Result
1. Unloading and Expansion Exfoliation domes
2. Salt weathering Granular foliation
3. Frost wedging Glacial regions - Question 43 of 109
43. Question
Category: NCERTConsider the following statements regarding biological weathering:
1. It refers to weathering caused by microorganisms only.
2. Biological weathering agents form weak acids, which can convert some of the minerals to clay.
Which of the above statements is/are correct?CorrectBiological weathering only refers to weathering caused by plants, animals, fungi, and micro-organisms such as bacteria.
IncorrectBiological weathering only refers to weathering caused by plants, animals, fungi, and micro-organisms such as bacteria.
- Question 44 of 109
44. Question
Category: NCERTConsider the following statements regarding mass movements:
1. It essentially happens because of gravitational pull.
2. Weathering is essential for mass movement.
Which of the above statements is/are correct?CorrectMass movement (also known as mass wasting) is the movement of masses of bodies of mud, bedrock, soil, and rock debris, which commonly happen along steep-sided hills and mountains because of the gravitational pull.
Weathering is not essential for mass movement though it helps mass movements.
IncorrectMass movement (also known as mass wasting) is the movement of masses of bodies of mud, bedrock, soil, and rock debris, which commonly happen along steep-sided hills and mountains because of the gravitational pull.
Weathering is not essential for mass movement though it helps mass movements.
- Question 45 of 109
45. Question
Category: NCERTConsider the following events with reference to the causes that may lead to mass movements:
1. Removal of support from below to materials above through natural or artificial means.
2. Overfilling through addition of materials by artificial filling or naturally.
3. Event of explosions.
Which of the above statements are correct?CorrectIncorrect - Question 46 of 109
46. Question
Category: NCERTConsider the following statements regarding the examples of the types of Mass Movement:
1. Soliɦuction is an example of rapid mass movement.
2. Mud-ɦow is an example of slow mass movement.
Which of the above statements is/are correct?CorrectSolifluction is an example of slow mass movement. Mud-Flow is an example of rapid mass movement.
IncorrectSolifluction is an example of slow mass movement. Mud-Flow is an example of rapid mass movement.
- Question 47 of 109
47. Question
Category: NCERTSolifluction refers to:
CorrectSolifluction involves slow down slope flowing soil mass or fine grained rock debris saturated or lubricated with water.
IncorrectSolifluction involves slow down slope flowing soil mass or fine grained rock debris saturated or lubricated with water.
- Question 48 of 109
48. Question
Category: NCERTOften, we see fence posts or telephone poles leaning downslope from their vertical position and in their linear alignment. It is due to which type of mass movement?
CorrectCreep is a type of slow mass movement that can occur on moderately steep, soil covered slopes. Fence posts, telephone poles leaning downslope from their vertical position and in their linear alignment is due to the creep effect.
IncorrectCreep is a type of slow mass movement that can occur on moderately steep, soil covered slopes. Fence posts, telephone poles leaning downslope from their vertical position and in their linear alignment is due to the creep effect.
- Question 49 of 109
49. Question
Category: NCERTConsider the following description:
“It occurs in humid regions with or without vegetation cover and occurs in narrow tracks on steep slopes. It can be much faster than the mudɦow.”
Above description accurately refers to which type of rapid mass movement?CorrectEarthflow, Mudflow and Debris Avalanche are types of rapid mass movement.
IncorrectEarthflow, Mudflow and Debris Avalanche are types of rapid mass movement.
- Question 50 of 109
50. Question
Category: NCERTConsider the following statements regarding landslides:
1. Slump is slipping of one or several units of rock debris with a backward rotation with respect to slope over which movement takes place.
2. Rapid rolling or sliding of earth debris without backward rotation of mass is known as debris slide.
Which of the above statements is/are correct?CorrectLandslides are relatively rapid and perceptible movements. The materials involved are relatively dry.
Slump is slipping of one or several units of rock debris with a backward rotation with respect to the slope over which the movement takes place.
strong>Rapid rolling or sliding of earth debris without backward rotation of mass is known as debris slide.IncorrectLandslides are relatively rapid and perceptible movements. The materials involved are relatively dry.
Slump is slipping of one or several units of rock debris with a backward rotation with respect to the slope over which the movement takes place.
strong>Rapid rolling or sliding of earth debris without backward rotation of mass is known as debris slide. - Question 51 of 109
51. Question
Category: NCERTIn our country, debris avalanche and landslides occur very frequently in the Himalayas. Which one of the following doesn’t account as a reason for it?
CorrectHimalayan ranges are situated at the convergence zone of two lithospheric plates i.e. Indian plate in South and Eurasian plate in North. It makes Himalayas are tectonically more
IncorrectHimalayan ranges are situated at the convergence zone of two lithospheric plates i.e. Indian plate in South and Eurasian plate in North. It makes Himalayas are tectonically more
- Question 52 of 109
52. Question
Category: NCERTConsider the following statements regarding erosional and depositional agents:
1. The erosion, transportation and deposition of earth materials is brought about by wind, running water, glaciers, waves and ground water.
2. Glaciers are more effective erosional agent than wind.
Which of the above statements is/are correct?CorrectErosion involves acquisition and transportation of rock debris.
Geomorphic agents like running water, groundwater, glaciers, wind and waves remove and transport and deposit it to other places depending upon the dynamics of each of these agents.
Though the glaciers move at very low velocities due to tremendous mass are more effective as the agents of erosion and wind, being in gaseous state, is less effective.IncorrectErosion involves acquisition and transportation of rock debris.
Geomorphic agents like running water, groundwater, glaciers, wind and waves remove and transport and deposit it to other places depending upon the dynamics of each of these agents.
Though the glaciers move at very low velocities due to tremendous mass are more effective as the agents of erosion and wind, being in gaseous state, is less effective. - Question 53 of 109
53. Question
Category: NCERTWhich of the following seismic waves are body waves?
1. Primary waves
2. Secondary waves
3. Love waves
Select the correct answer using the code given below:CorrectBoth P and S waves penetrate the interior of the Earth while surface waves do not. Due to this, P and S waves are known as “body waves”.
The Love (L) waves are surface waves as they travel along the surface of the earth from the point directly above the quake or epicentre. L waves are shear waves where the shearing (back and forth) motion.
IncorrectBoth P and S waves penetrate the interior of the Earth while surface waves do not. Due to this, P and S waves are known as “body waves”.
The Love (L) waves are surface waves as they travel along the surface of the earth from the point directly above the quake or epicentre. L waves are shear waves where the shearing (back and forth) motion.
- Question 54 of 109
54. Question
Category: NCERTWith reference to Primary waves (P-waves), consider the following statements:
1. P-waves move the fastest and are the first to arrive at the surface.
2. These waves can travel only through solid materials.
Which of the above statements is/are correct?CorrectThere are two types of body waves. They are called P and S-waves. P-waves move faster and are the first to arrive at the surface.
The P-waves are similar to sound waves. They travel through gaseous, liquid and solid materials.
IncorrectThere are two types of body waves. They are called P and S-waves. P-waves move faster and are the first to arrive at the surface.
The P-waves are similar to sound waves. They travel through gaseous, liquid and solid materials.
- Question 55 of 109
55. Question
Category: NCERTWith reference to Epicenter, consider the following statements:
1. The point on the surface, nearest to the focus, is called epicenter.
2. It is the first one to experience the earthquake waves.
Which of the above statements is/are correct?CorrectThe point where the energy is released is called the focus of an earthquake or the hypocenter. The point on the surface, directly above the focus, nearest to the focus, is called epicenter. It is the first one to experience the waves.
IncorrectThe point where the energy is released is called the focus of an earthquake or the hypocenter. The point on the surface, directly above the focus, nearest to the focus, is called epicenter. It is the first one to experience the waves.
- Question 56 of 109
56. Question
Category: NCERTConsider the following statements about seismic waves:
1. P – wave shadow zone lies between 104 to 142 degrees.
2. S – wave shadow zone lies between 103 to 142 degrees.
Which of the above statements is/are correct?CorrectThe seismic shadow zone is the reach of the Earth’s surface where seismographs cannot detect an earthquake after the waves have passed through the earth.
P-waves are refracted by the liquid outer core and are not detected between 104° and 142°.
S-waves cannot pass through the liquid outer core and are not detected beyond 103°.
IncorrectThe seismic shadow zone is the reach of the Earth’s surface where seismographs cannot detect an earthquake after the waves have passed through the earth.
P-waves are refracted by the liquid outer core and are not detected between 104° and 142°.
S-waves cannot pass through the liquid outer core and are not detected beyond 103°.
- Question 57 of 109
57. Question
Category: NCERTWith reference to Shadow Zone, consider the following statements:
1. It is a specific area on the earth’s surface where the seismic waves are reported.
2. For each earthquake there exists an altogether different shadow zone.
Which of the above statements is/are correct?CorrectThe seismic shadow zone is the reach of the Earth’s surface where seismographs cannot detect an earthquake after the waves have passed through the earth.
The study of different events reveals that for each earthquake, there exists an altogether different shadow zone.IncorrectThe seismic shadow zone is the reach of the Earth’s surface where seismographs cannot detect an earthquake after the waves have passed through the earth.
The study of different events reveals that for each earthquake, there exists an altogether different shadow zone. - Question 58 of 109
58. Question
Category: NCERTEarthquake waves get recorded in seismographs located at far off locations. However, there exist some specific areas where the waves are not reported. Such a zone is called as:
CorrectIncorrect - Question 59 of 109
59. Question
Category: NCERTConsider the following statements with respect to the types of earthquakes:
1. Explosion earthquakes occur in the areas of intense mining activity.
2. Ground shaking may also occur due to the explosion of chemical or nuclear devices. Such tremors are called collapse earthquakes.
Which of the above statements is/are correct?CorrectIn the areas of intense mining activity, sometimes the roofs of underground mines collapse causing minor tremors. These are called collapse earthquakes. Ground shaking may also occur due to the explosion of chemical or nuclear devices. Such tremors are called explosion earthquakes.
IncorrectIn the areas of intense mining activity, sometimes the roofs of underground mines collapse causing minor tremors. These are called collapse earthquakes. Ground shaking may also occur due to the explosion of chemical or nuclear devices. Such tremors are called explosion earthquakes.
- Question 60 of 109
60. Question
Category: NCERTEarthquake is a natural hazard. Which of the following are the immediate effects of earthquake?
1. Differential ground settlement
2. Soil liquefaction
3. Ground lurching
4. Avalanches
Select the correct answer using the code given below:CorrectIncorrect - Question 61 of 109
61. Question
Category: NCERTThe earthquake events are scaled either according to the magnitude or intensity of the shock. Consider the following statements in this regard:
1. The magnitude scale is known as the Richter scale wherein the magnitude relates to the energy released during the quake.
2. The intensity scale is known as the Mercalli scale which takes into account the visible damage caused by the event.
Which of the above statements is/are incorrectCorrectThe magnitude scale is known as the Richter scale. The magnitude relates to the energy released during the quake. The magnitude is expressed in numbers, 0-10.
IncorrectThe magnitude scale is known as the Richter scale. The magnitude relates to the energy released during the quake. The magnitude is expressed in numbers, 0-10.
- Question 62 of 109
62. Question
Category: NCERTConsider the following statements regarding Earthquake Waves:
1. All natural earthquakes take place in the asthenosphere.
2. Body waves are faster than Surface waves and arrive first at the Surface hence they are more damaging than surface waves.
Which of the above statements is/are incorrect?CorrectAll natural earthquakes take place in the lithosphere. Although body waves are faster and arrive first at the surface they are less damaging than surface waves.
IncorrectAll natural earthquakes take place in the lithosphere. Although body waves are faster and arrive first at the surface they are less damaging than surface waves.
- Question 63 of 109
63. Question
Category: NCERTConsider the following statements regarding Body Waves:
1. The velocity and density changes as the Body waves travel through materials of different densities that helps in understanding the structure of Earth’s interior.
2. Surface wave is a type of Body wave.
Which of the above statements is/are correct?CorrectThe body waves interact with the surface rocks and generate a new set of waves called surface waves. Surface wave is a type of earthquake wave (not of body wave). These waves are more destructive.
IncorrectThe body waves interact with the surface rocks and generate a new set of waves called surface waves. Surface wave is a type of earthquake wave (not of body wave). These waves are more destructive.
- Question 64 of 109
64. Question
Category: NCERTConsider the following statements with respect to volcanic eruption:
1. The material in the upper mantle portion is called lava.
2. Once it starts moving towards the crust or it reaches the surface, it is referred to as magma.
Which of the above statements is/are incorrect?CorrectThe material in the upper mantle portion is called magma. Once it starts moving towards the crust or it reaches the surface, it is referred to as Lava.
IncorrectThe material in the upper mantle portion is called magma. Once it starts moving towards the crust or it reaches the surface, it is referred to as Lava.
- Question 65 of 109
65. Question
Category: NCERTConsider the following statements:
1. Composite Volcanoes are characterized by eruptions of cooler and more viscous lavas than basalt.
2 The Hawaiian volcanoes are the most famous examples of Composite Volcanoes.
Which of the above statements is/are correct?CorrectBarring the basalt flows, the shield volcanoes are the largest of all the volcanoes on the earth. The Hawaiian volcanoes are the most famous examples.
Composite Volcanoes are characterized by eruptions of cooler and more viscous lavas than basalt. These volcanoes often result in explosive eruptions.
IncorrectBarring the basalt flows, the shield volcanoes are the largest of all the volcanoes on the earth. The Hawaiian volcanoes are the most famous examples.
Composite Volcanoes are characterized by eruptions of cooler and more viscous lavas than basalt. These volcanoes often result in explosive eruptions.
- Question 66 of 109
66. Question
Category: NCERTConsider the following statements:
1. Flood basalt provinces volcanoes outpour highly fluid lava that flows for long distances.
2. The Deccan Traps covering most of the Maharashtra plateau, are example of flood basalt province.
Which of the above statements is/are incorrect?CorrectFlood Basalt Provinces volcanoes outpour highly fluid lava that flows for long distances.
The Deccan Traps are a much larger flood basalt province.
IncorrectFlood Basalt Provinces volcanoes outpour highly fluid lava that flows for long distances.
The Deccan Traps are a much larger flood basalt province.
- Question 67 of 109
67. Question
Category: NCERTThe volcanoes that occur in the oceanic areas are known as:
CorrectMid-Ocean Ridge Volcanoes: These volcanoes occur in the oceanic areas. There is a system of mid-ocean ridges more than 70,000 km long that stretches through all the ocean basins. The central portion of this ridge experiences frequent eruptions.
IncorrectMid-Ocean Ridge Volcanoes: These volcanoes occur in the oceanic areas. There is a system of mid-ocean ridges more than 70,000 km long that stretches through all the ocean basins. The central portion of this ridge experiences frequent eruptions.
- Question 68 of 109
68. Question
Category: NCERTConsider the following statements with respect to the volcanic landforms:
1. Batholiths are large body of magmatic material that cools in the deeper depth of the crust develop in the form of large domes.
2. The Karnataka plateau is spotted with domal hills of granite rock are examples of lacoliths.
Which of the above statements is/are correct?CorrectBatholiths: A large body of magmatic material that cools in the deeper depth of the crust develops in the form of large domes. They appear on the surface only after the denudational processes remove the overlying materials.
The Karnataka plateau is spotted with domal hills of granite rocks. Most of these, now exfoliated, are examples of lacoliths or batholiths.
IncorrectBatholiths: A large body of magmatic material that cools in the deeper depth of the crust develops in the form of large domes. They appear on the surface only after the denudational processes remove the overlying materials.
The Karnataka plateau is spotted with domal hills of granite rocks. Most of these, now exfoliated, are examples of lacoliths or batholiths.
- Question 69 of 109
69. Question
Category: NCERTMatch the following:
List I List II
A. Lapoliths 1. It is an example of Flood Basalt Province.
B. Sills 2. A type of intrusive volcanic landforms having saucer shape.
C. Dykes 3. A vertical wall-like structure that forms after cooling of lava.
D. Deccan Trap 4. A thin horizontal intrusive igneous landform.
Select the correct answer using the code given below:
A B C DCorrectList I List II
A. Lapoliths 2. A type of intrusive volcanic landforms having saucer shape.
B. Sills 4. A thin horizontal intrusive igneous landform.
C. Dykes 3. A vertical wall- like structure that forms after cooling of lava.
D. Deccan Trap 1. It is an example of Flood Basalt Province.IncorrectList I List II
A. Lapoliths 2. A type of intrusive volcanic landforms having saucer shape.
B. Sills 4. A thin horizontal intrusive igneous landform.
C. Dykes 3. A vertical wall- like structure that forms after cooling of lava.
D. Deccan Trap 1. It is an example of Flood Basalt Province. - Question 70 of 109
70. Question
Category: NCERTWhich of the following is not an Intrusive Volcanic landform?
CorrectIntrusive landforms are formed when magma cools within the crust. The intrusive activity of volcanoes gives rise to various forms.
- Batholiths
- Laccoliths
- Phacoliths
- Sills
- Dykes
IncorrectIntrusive landforms are formed when magma cools within the crust. The intrusive activity of volcanoes gives rise to various forms.
- Batholiths
- Laccoliths
- Phacoliths
- Sills
- Dykes
- Question 71 of 109
71. Question
Category: NCERTWith reference to Zealandia, which of the following statements is incorrect?
CorrectAlthough Zealandia was submerged from the time it separated from Australia and Antarctica – part of the ancient continent of Gondwana – 80 million years ago, this event pushed it deeper beneath the sea.
IncorrectAlthough Zealandia was submerged from the time it separated from Australia and Antarctica – part of the ancient continent of Gondwana – 80 million years ago, this event pushed it deeper beneath the sea.
- Question 72 of 109
72. Question
Category: NCERTWhich of the following evidences support the Continental Drift Theory?
1. Matching of Africa and South America continents.
2. Rocks of the same age across the oceans
3. Absences of source rock in the region of rich placer deposits
4. Distribution of fossils
Select the correct answer using the code given below:CorrectIncorrect - Question 73 of 109
73. Question
Category: NCERTConsider the following statements regarding ‘Continental Drift Theory’ suggested by Alfred Wegener:
1. He named super-continent as Pangaea, which meant all earth.
2. Pangaea broke into three large continental masses as Laurasia, Gondwanaland, and Panthalassa.
Which of the above statements is/are correct?CorrectThe supercontinent was named PANGAEA, which meant all earth. The mega-ocean was called PANTHALASSA, meaning all water. He argued that, around 200 million years ago, the supercontinent, Pangaea, began to split. Pangaea first broke into two large continental masses as Laurasia and Gondwanaland forming the northern and southern components respectively.
IncorrectThe supercontinent was named PANGAEA, which meant all earth. The mega-ocean was called PANTHALASSA, meaning all water. He argued that, around 200 million years ago, the supercontinent, Pangaea, began to split. Pangaea first broke into two large continental masses as Laurasia and Gondwanaland forming the northern and southern components respectively.
- Question 74 of 109
74. Question
Category: NCERTWith reference to the theory of Isostasy, consider the following statements:
1. It is based on the opposing influence of two main forces i.e. Buoyancy and Gravity
2. It is the state of gravitational equilibrium between earth’s crust and core.
Which of the above statements is/are correct?CorrectTheory of Isostasy, is a fundamental concept in geology, is based on the opposing influence of two main forces – Buoyancy and Gravity. It is the state of gravitational equilibrium between earth’s crust and mantle.
IncorrectTheory of Isostasy, is a fundamental concept in geology, is based on the opposing influence of two main forces – Buoyancy and Gravity. It is the state of gravitational equilibrium between earth’s crust and mantle.
- Question 75 of 109
75. Question
Category: NCERTConsider the following statements about the sea floor spreading theory:
1. The theory was proposed by Harry Hess.
2. One of the assumptions made is that spreading of one ocean causes the shrinking of the other.
Which of the above statements is/are correct?CorrectThe analysis of magnetic properties of the rocks on either side of the mid-oceanic ridge led Harry Hess (1961) to propose his hypothesis, known as the “sea floor spreading”.
IncorrectThe analysis of magnetic properties of the rocks on either side of the mid-oceanic ridge led Harry Hess (1961) to propose his hypothesis, known as the “sea floor spreading”.
- Question 76 of 109
76. Question
Category: NCERTWhich of the following forces, according to Alfred Wegener, were responsible for the drifting of the continents?
CorrectWegener suggested that the movement responsible for the drifting of the continents caused by pole fleeing force and tidal force. The polar-fleeing force relates to the rotation of the earth.
IncorrectWegener suggested that the movement responsible for the drifting of the continents caused by pole fleeing force and tidal force. The polar-fleeing force relates to the rotation of the earth.
- Question 77 of 109
77. Question
Category: NCERTConsider the following statements about the Convectional Current Theory:
1. Convection currents are generated due to radioactive elements causing thermal differences in the inner core portion of the earth.
2. These convection currents spread from core to the mantle portion resulting in the force for the drift of the continents.
Which of the above statements is/are correct?CorrectArthur Holmes in 1930s discussed the possibility of convection currents operating in the mantle portion.
These currents are generated due to radioactive elements causing thermal differences in the mantle portion.
IncorrectArthur Holmes in 1930s discussed the possibility of convection currents operating in the mantle portion.
These currents are generated due to radioactive elements causing thermal differences in the mantle portion.
- Question 78 of 109
78. Question
Category: NCERTWhich of the following plates can be categorized as the major plates?
1. Antarctica and Pacific plate
2. North American Plate
3. Arabian Plate
4. Caroline Plate
Select the correct answer using the code given below:CorrectMajor Plates
- Antarctica and the surrounding oceanic plate
- North American (with western Atlantic floor separated from the South American plate along the Caribbean islands) plate
- South American (with western Atlantic floor separated from the North American plate along the Caribbean islands) plate
- Pacific plate
- India-Australia-New Zealand plate
- Africa with the eastern Atlantic floor plate
- Eurasia and the adjacent oceanic plate.
IncorrectMajor Plates
- Antarctica and the surrounding oceanic plate
- North American (with western Atlantic floor separated from the South American plate along the Caribbean islands) plate
- South American (with western Atlantic floor separated from the North American plate along the Caribbean islands) plate
- Pacific plate
- India-Australia-New Zealand plate
- Africa with the eastern Atlantic floor plate
- Eurasia and the adjacent oceanic plate.
- Question 79 of 109
79. Question
Category: NCERTMatch the following:
Minor Tectonic Plates Extension
A. Cocos plate 1. Between South America and Pacific plate
B. Nazca plate 2. Between Central America and Pacific plate
C. Arabian plate 3. Mostly the Saudi Arabian landmass
Select the correct answer using the code given below:
A B CCorrectSome important minor plates are listed below:
- Cocos plate: Between Central America and Pacific plate
- Nazca plate: Between South America and Pacific plate
- Arabian plate: Mostly the Saudi Arabian landmass
- Philippine plate: Between the Asiatic and Pacific plate
- Caroline plate: Between the Philippine and Indian plate (North of New Guinea)
- Fuji plate: North-east of Australia
IncorrectSome important minor plates are listed below:
- Cocos plate: Between Central America and Pacific plate
- Nazca plate: Between South America and Pacific plate
- Arabian plate: Mostly the Saudi Arabian landmass
- Philippine plate: Between the Asiatic and Pacific plate
- Caroline plate: Between the Philippine and Indian plate (North of New Guinea)
- Fuji plate: North-east of Australia
- Question 80 of 109
80. Question
Category: NCERTWhich of the following statements is/are correct about the divergent plate boundaries?
1. Mid-Atlantic Ridge is an example of divergent plate.
2. New Crust is created when plates pull apart from each other.
Select the correct answer using the code given below:CorrectAt Divergent Boundaries new crust is generated as the plates pull away from each other.
The best-known example of divergent boundaries is the Mid-Atlantic Ridge.
IncorrectAt Divergent Boundaries new crust is generated as the plates pull away from each other.
The best-known example of divergent boundaries is the Mid-Atlantic Ridge.
- Question 81 of 109
81. Question
Category: NCERTConsider the following statements about the convergent boundaries as per plate tectonics theory:
1. Crust is destroyed when two plates converge.
2. Only convergence of oceanic and continental plates is possible.
Which of the above statements is/are correct?CorrectThree types of convergence are possible:
- between an oceanic and continental plate
- between two oceanic plates
- between two continental plates
IncorrectThree types of convergence are possible:
- between an oceanic and continental plate
- between two oceanic plates
- between two continental plates
- Question 82 of 109
82. Question
Category: NCERTWhich of the following statements is/are correct about the plate movement?
1. The strips of normal and reverse magnetic field that parallel the mid-oceanic ridges help scientists determine the rates of plate movement
2. Convection current is responsible for the movement of the plates.
Select the correct answer using the code given below:CorrectThe heated material rises to the surface, spreads and begins to cool, and then sinks back into deeper depths.
This cycle is repeated over and over to generate what scientists call a convection cell or convective flow.
IncorrectThe heated material rises to the surface, spreads and begins to cool, and then sinks back into deeper depths.
This cycle is repeated over and over to generate what scientists call a convection cell or convective flow.
- Question 83 of 109
83. Question
Category: NCERTWhich of the following physiographic features are formed due to collision of Continental plates on the Earth’s surface?
1. The Alps
2. The Himalayas
3. The Rockies
4. The Caucasus Mountains
Select the correct answer using the code given below:CorrectConvergent boundaries: There are two main ways that two plates can converge. In a collision boundary, the two plates push almost equally against each other, buckling the material up in the middle. This leads to the formation of mountain ranges, such as the Himalayas and the Alps.
In a tectonic plate collision, mountains are formed such as the Caucasus Mountains (between the Arabian plate moving northwards with respect to the Eurasian plate) and the Rockies (between American Plate and Pacific Plate).
IncorrectConvergent boundaries: There are two main ways that two plates can converge. In a collision boundary, the two plates push almost equally against each other, buckling the material up in the middle. This leads to the formation of mountain ranges, such as the Himalayas and the Alps.
In a tectonic plate collision, mountains are formed such as the Caucasus Mountains (between the Arabian plate moving northwards with respect to the Eurasian plate) and the Rockies (between American Plate and Pacific Plate).
- Question 84 of 109
84. Question
Category: NCERTWhich of the following statements is incorrect regarding variation of biodiversity over Earth’s surface?
CorrectThe weathering of Earth’s crust is the basis for the diversity of vegetation and hence biodiversity.
IncorrectThe weathering of Earth’s crust is the basis for the diversity of vegetation and hence biodiversity.
- Question 85 of 109
85. Question
Category: NCERTWhich of the following best explains the landforms ‘Mesas and Buttes’?
CorrectMesa is a flat, table like land mass with a very resistant horizontal top layer & very steep sides, may be formed in canyon region.
Continuous denudation through ages may reduce Mesas in area so that they become isolated flat topped hills called Buttes. Many of which are separated by deep gorges & canyons.
IncorrectMesa is a flat, table like land mass with a very resistant horizontal top layer & very steep sides, may be formed in canyon region.
Continuous denudation through ages may reduce Mesas in area so that they become isolated flat topped hills called Buttes. Many of which are separated by deep gorges & canyons.
- Question 86 of 109
86. Question
Category: NCERTConsider the following statements regarding Pediments and Pediplains:
1. Pediments are formed by lateral erosion by combined action of wind and streams.
2. Pediplains are fluvial landforms which are found in the foot of hills in desert while pediments are low-lying reliefs found in deserts.
Which of the above statements is/are correct?CorrectPediplains are low-lying featureless plains in deserts covered with debris or not while Pediments are gently inclines rocky floors attached to the mountains.
IncorrectPediplains are low-lying featureless plains in deserts covered with debris or not while Pediments are gently inclines rocky floors attached to the mountains.
- Question 87 of 109
87. Question
Category: NCERTConsider the following statements regarding erosional desert landforms:
1. Playas are shallow lakes formed at the centre of basin surrounded from all sides by uplands.
2. Deflation hollows are shallow depressions formed due to persistent movement of wind currents in a particular direction.
Which of the above statements is/are correct?CorrectIn deserts, in times of sufficient water in the plain is covered up by a shallow water body called as Playas where water is retained only for short duration due to evaporation and quite often the Playas contain good deposition of salts. The Playa plain covered up by salts is called alkali flats.
Weathered mantle from over the rocks or bare soil, gets blown out by persistent movement of wind currents in one direction. This process may create shallow depressions called Deflation Hollows.
IncorrectIn deserts, in times of sufficient water in the plain is covered up by a shallow water body called as Playas where water is retained only for short duration due to evaporation and quite often the Playas contain good deposition of salts. The Playa plain covered up by salts is called alkali flats.
Weathered mantle from over the rocks or bare soil, gets blown out by persistent movement of wind currents in one direction. This process may create shallow depressions called Deflation Hollows.
- Question 88 of 109
88. Question
Category: NCERTConsider the following statements regarding different erosional fluvial landforms:
1. Mushroom rocks are formed due to equivalent erosional action of winds at different level from earth’s surface.
2. When the top of a mushroom rocks carved out as square then it is called pedestal rock.
Which of the above statements is/are correct?CorrectMushroom rocks are formed due to differential erosional action of winds not equivalent erosional action at different level from earth’s surface. When the top of a mushroom rocks carved out as square then it is called table rocks not pedestal rock.
IncorrectMushroom rocks are formed due to differential erosional action of winds not equivalent erosional action at different level from earth’s surface. When the top of a mushroom rocks carved out as square then it is called table rocks not pedestal rock.
- Question 89 of 109
89. Question
Category: NCERTConsider the following statements regarding depositional landforms in deserts:
1. Barchans are parabolic shaped sand dunes found in desert.
2. Longitudinal dunes are formed when supply of sand blowing in the region is good and wind direction is not constant.
Which of the above statements is/are incorrect?CorrectBoth Barchans and Siefs are Crescent shaped. Barchans have both wings while Siefs has only one wing.
Longitudinal dunes are formed when supply of sand blowing in the region is poor and wind blowing is constant.
IncorrectBoth Barchans and Siefs are Crescent shaped. Barchans have both wings while Siefs has only one wing.
Longitudinal dunes are formed when supply of sand blowing in the region is poor and wind blowing is constant.
- Question 90 of 109
90. Question
Category: NCERTWhich of the following statements is correct regarding Loess?
CorrectWhen the surface is covered by deposits of wind transported silt that has settled out from dust storms over many thousands of years. This material is known as Loess.
IncorrectWhen the surface is covered by deposits of wind transported silt that has settled out from dust storms over many thousands of years. This material is known as Loess.
- Question 91 of 109
91. Question
Category: NCERTMeanders are formed in which of the following course of the river?
1. Mountain course
2. Middle course
3. Lower course
Select the correct answer using the code given below:CorrectMeanders, ox bow lakes, basins all are formed in the midcourse of the river.
IncorrectMeanders, ox bow lakes, basins all are formed in the midcourse of the river.
- Question 92 of 109
92. Question
Category: NCERTConsider the following statements regarding erosional landforms created by rivers:
1. Canyon is an extreme type of V-shaped valley with the very steep sides and no valley floor.
2. Grand Canyon is associated with the Colorado River.
Which of the above statements is/are correct?CorrectV-shaped valleys are divided into two types: Gorges and Canyons.
Gorges and Canyons Normally a very deep and narrow valley is called a Gorge and the extended form of a Gorge is called a canyon.
IncorrectV-shaped valleys are divided into two types: Gorges and Canyons.
Gorges and Canyons Normally a very deep and narrow valley is called a Gorge and the extended form of a Gorge is called a canyon.
- Question 93 of 109
93. Question
Category: NCERTWhich of the following landforms are formed by river streams during their youth stage?
1. V-Shaped valleys
2. Rapids
3. Waterfalls
4. Oxbow lakes
Select the correct answer using the code given below:CorrectIncorrect - Question 94 of 109
94. Question
Category: NCERTWhich of the following are the erosional landforms formed by running water?
1. Potholes and Plunge Pools
2. River Terraces
3. Floodplains
4. Sinkholes
5. Incised meanders
Select the correct answer using the code given below:CorrectValleys, Potholes and Plunge Pools, Incised or entrenched Meanders, River Terraces are the erosional landforms formed by running water.
Floodplains are the depositional landforms formed by running water.
Sinkholes are the erosional landforms formed by ground water.
IncorrectValleys, Potholes and Plunge Pools, Incised or entrenched Meanders, River Terraces are the erosional landforms formed by running water.
Floodplains are the depositional landforms formed by running water.
Sinkholes are the erosional landforms formed by ground water.
- Question 95 of 109
95. Question
Category: NCERTWhich of the following statements is incorrect?
CorrectIncorrect - Question 96 of 109
96. Question
Category: NCERTWhich of the following statements is/are correct with reference to meandering of rivers?
1. It is a channeled pattern formed over floodplains and delta plains.
2. Its formations depend upon the propensity of water flowing, unconsolidated nature of alluvial deposits and Coriolis Force.
Select the correct answer using the code given below:CorrectLoop-like channel patterns called meanders develop over flood and delta plains. Coriolis Force acting on the fluid water deflecting it like it deflects the wind.
IncorrectLoop-like channel patterns called meanders develop over flood and delta plains. Coriolis Force acting on the fluid water deflecting it like it deflects the wind.
- Question 97 of 109
97. Question
Category: NCERTConsider the following landforms:
1. Natural levees and point bars are the erosional landforms associated with floodplains.
2. Point bars are the sediments deposited on the convex side of meanders of large rivers.
Which of the above statements is/are correct?CorrectNatural levees and point bars are the depositional landforms associated with floodplains.
Natural levees are found along the banks of large rivers. Point bars are found on the convex side of meanders of large rivers.
IncorrectNatural levees and point bars are the depositional landforms associated with floodplains.
Natural levees are found along the banks of large rivers. Point bars are found on the convex side of meanders of large rivers.
- Question 98 of 109
98. Question
Category: NCERTWhich of the following are erosional features in a fluvial landscape?
1. River terrace
2. Incised Meander
3. Fans
4. Deltas
Select the correct answer using the code given below:CorrectIncorrect - Question 99 of 109
99. Question
Category: NCERTWhich of the following is not a feature of karsts landforms?
CorrectAny limestone or dolomitic region showing typical landforms produced by the action of groundwater through the processes of solution and deposition is called Karst topography.
Point bars are important landforms found associated with floodplains.
IncorrectAny limestone or dolomitic region showing typical landforms produced by the action of groundwater through the processes of solution and deposition is called Karst topography.
Point bars are important landforms found associated with floodplains.
- Question 100 of 109
100. Question
Category: NCERTWhich of the following statements is/are correct with reference to Karst topography?
1. It is a result of the action of groundwater through the processes of solution and deposition.
2. It is a dominant feature of the limestone regions.
Select the correct answer using the code given below:CorrectIncorrect - Question 101 of 109
101. Question
Category: NCERTWhich one of the following sentences best defines the term ‘Uvalas’?
CorrectWhen sink holes and dolines join together because of slumping of materials along their margins or due to roof collapse of caves, long, narrow to wide trenches called valley sinks or Uvalas form.
IncorrectWhen sink holes and dolines join together because of slumping of materials along their margins or due to roof collapse of caves, long, narrow to wide trenches called valley sinks or Uvalas form.
- Question 102 of 109
102. Question
Category: NCERTConsider the following landforms:
1. A stalagmite is a mineral formation that has its base on the ceiling of a cave whereas stalactites rise up from the ɦoor of the caves.
2. Stalagmites and stalactites are the depositional landforms of groundwater.
Which of the above statements is/are correct?CorrectStalactite is a mineral formation that has its base on the ceiling of a cave whereas Stalagmite rises up from the floor of the caves. In fact, stalagmites form due to dripping water from the surface or through the thin pipe, of the stalactite, immediately below it.
IncorrectStalactite is a mineral formation that has its base on the ceiling of a cave whereas Stalagmite rises up from the floor of the caves. In fact, stalagmites form due to dripping water from the surface or through the thin pipe, of the stalactite, immediately below it.
- Question 103 of 109
103. Question
Category: NCERTConsider the following statements regarding the continental glaciers:
1. A thick ice sheet covering a vast area of land is called a continental glacier.
2. Continental glaciers build up at the centre and move outward in all directions.
Which of the above statements is/are correct?CorrectA thick ice sheet covering a vast area of land is called a continental a glacier. Glaciers of this type build up at the centre and move outward in all directions.
IncorrectA thick ice sheet covering a vast area of land is called a continental a glacier. Glaciers of this type build up at the centre and move outward in all directions.
- Question 104 of 109
104. Question
Category: NCERTConsider the following statements regarding the Valley Glaciers:
1. When a mass of ice from the high mountainous regions starts moving down into the pre-existing valleys, it is called a valley glacier.
2. Siachen Glacier lies in the Pir Panjal Range of Himalayas.
Which of the above statements is/are correct?CorrectThe longest glacier in India is the Siachen Glacier in Karakoram Range which is 72 km long.
IncorrectThe longest glacier in India is the Siachen Glacier in Karakoram Range which is 72 km long.
- Question 105 of 109
105. Question
Category: NCERTWhich of the following landforms is/are created by glacial erosion?
1. Cirque
2. ‘U’ shaped valley
3. Hanging Valley
Select the correct answer using the code given below:CorrectThe landforms like Cirque, ‘U’ shaped valley, Hanging Valley etc are created by the glacial erosion.
IncorrectThe landforms like Cirque, ‘U’ shaped valley, Hanging Valley etc are created by the glacial erosion.
- Question 106 of 109
106. Question
Category: NCERTConsider the following statements regarding the Hanging Valley:
1. The Hanging Valley of the tributary glacier looks like hanging downwards at the point of its confluence with the main valley.
2. When the ice melts in the hanging valley, a waterfall is formed at the point of confluence of this stream with the main river.
Which of the above statements is/are correct?CorrectHanging valleys are formed as a result of the erosion effects of glaciations. Hanging valleys are shallow canyons formed over a larger canyon, and are tributary valleys to the larger valleys.
IncorrectHanging valleys are formed as a result of the erosion effects of glaciations. Hanging valleys are shallow canyons formed over a larger canyon, and are tributary valleys to the larger valleys.
- Question 107 of 109
107. Question
Category: NCERTConsider the following statements regarding the Erosional Landforms formed by glaciers:
1. Horns are formed by lateral erosion of the Cirque walls by glaciers.
2. Serrated Ridges or Arêtes are formed by the erosion of headwall of Cirques.
Which of the above statements is/are incorrect?CorrectErosional landforms formed by glaciers: Horns and Serrated ridges. Horns are formed through headward erosion of the cirque walls.
IncorrectErosional landforms formed by glaciers: Horns and Serrated ridges. Horns are formed through headward erosion of the cirque walls.
- Question 108 of 109
108. Question
Category: NCERTConsider the following statements regarding the Glacial Valleys and Troughs:
1. Glacial Valleys contain moraines, hanging valleys and are swampy in appearance.
2. Fiords are shallow depressions found alongside glacial valleys.
Which of the above statements is/are incorrect?CorrectGlaciated valleys are trough-like and U-shaped with broad floors and relatively smooth and steep sides. The valleys may contain littered debris or debris shaped as moraines with swampy appearance.
Very deep glacial troughs filled with sea water and making up shorelines (in high latitudes) are called Fjords/Fiords.
IncorrectGlaciated valleys are trough-like and U-shaped with broad floors and relatively smooth and steep sides. The valleys may contain littered debris or debris shaped as moraines with swampy appearance.
Very deep glacial troughs filled with sea water and making up shorelines (in high latitudes) are called Fjords/Fiords.
- Question 109 of 109
109. Question
Category: NCERTWhen the glacier melts or retreats, it deposits its load of different parts and the deposited debris called moraines. Consider the following statements regarding different types of moraines:
1. Moraines thus formed on the confluence of two glaciers are called terminal moraines.
2. When the glacier melts, the debris is deposited at the end of the valley glacier in the form of a ridge called lateral moraine.
3. The moraine which is deposited on either side of a glacier is called medial moraine.
Which of the above statements is/are incorrect?CorrectTerminal Moraine: when the glacier melts, the debris is deposited at the end of the valley glacier in the form of a ridge called Terminal Moraine.
Lateral Moraine: moraine which is deposited on either side of a glacier is called Lateral Moraine.
Medial Moraine: when two glaciers join each other their lateral moraines also join. Moraines thus formed on the confluence of two glaciers are called medial moraines.
Ground Moraine: It consists of deposits left behind in areas once covered by glaciers. It is seen only after the glacial ice has disappeared by melting.
IncorrectTerminal Moraine: when the glacier melts, the debris is deposited at the end of the valley glacier in the form of a ridge called Terminal Moraine.
Lateral Moraine: moraine which is deposited on either side of a glacier is called Lateral Moraine.
Medial Moraine: when two glaciers join each other their lateral moraines also join. Moraines thus formed on the confluence of two glaciers are called medial moraines.
Ground Moraine: It consists of deposits left behind in areas once covered by glaciers. It is seen only after the glacial ice has disappeared by melting.