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All questions of Rocks for Primary 5 Exam
A large part of forest was cleared by burning. What it will happen to the area?- a)Soil erosion will increase
- b)Soil erosion will decrease
- c)Wild life will increase
- d)More vegetation will grow
Correct answer is option 'A'. Can you explain this answer?
A large part of forest was cleared by burning. What it will happen to the area?
a)
Soil erosion will increase
b)
Soil erosion will decrease
c)
Wild life will increase
d)
More vegetation will grow
|
5cspm Keerthi answered |
A)because when we are cleared the forest by burning and that area will get soil erosion will increase thank you
Which of the following is igneous rock- a)Basalt
- b)Quartzite
- c)Slate
- d)All of these
Correct answer is option 'A'. Can you explain this answer?
Which of the following is igneous rock
a)
Basalt
b)
Quartzite
c)
Slate
d)
All of these
|
Gopal Mishra answered |
The right answer will be Besalt. Besalt is a hard ,black -coloured fine -grained igneous rock.
Which of the following rock preserves the fossils- a)Igneous
- b)Metamorphic
- c)Sedimentary
- d)All of these
Correct answer is option 'C'. Can you explain this answer?
Which of the following rock preserves the fossils
a)
Igneous
b)
Metamorphic
c)
Sedimentary
d)
All of these
|
Aditi Sharma answered |
Answer :
There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all fossils are preserved in sedimentary rock. Organisms that live in topographically low places (such as lakes or ocean basins) have the best chance of being preserved.
The rock used for building materials like tiles and bricks is made from- a)Limestone
- b)Shale
- c)Sand stone
- d)Granite
Correct answer is option 'B'. Can you explain this answer?
The rock used for building materials like tiles and bricks is made from
a)
Limestone
b)
Shale
c)
Sand stone
d)
Granite
|
Gargi Rane answered |
Rock used for building materials
Building materials such as tiles and bricks are made from rocks. The type of rock used for making building materials depends on the properties required for the final product.
Types of rocks used for building materials
There are several types of rocks that can be used for building materials. Some of the common ones are:
1. Limestone - Limestone is a sedimentary rock that is often used for making cement and concrete.
2. Sandstone - Sandstone is a sedimentary rock that is composed of sand-sized grains of mineral, rock, or organic material. It is often used for building facades, walls, and paving.
3. Granite - Granite is a type of igneous rock that is made up of feldspar, quartz, and mica. It is used for building countertops, flooring, and walls.
4. Shale - Shale is a fine-grained sedimentary rock that is often used for making bricks, tiles, and other building materials.
Correct Answer
The correct answer to the question is option 'B' - Shale. Shale is a type of sedimentary rock that is easily split into thin layers, making it ideal for making bricks and tiles. It is also a common material used for building walls and other structures.
Building materials such as tiles and bricks are made from rocks. The type of rock used for making building materials depends on the properties required for the final product.
Types of rocks used for building materials
There are several types of rocks that can be used for building materials. Some of the common ones are:
1. Limestone - Limestone is a sedimentary rock that is often used for making cement and concrete.
2. Sandstone - Sandstone is a sedimentary rock that is composed of sand-sized grains of mineral, rock, or organic material. It is often used for building facades, walls, and paving.
3. Granite - Granite is a type of igneous rock that is made up of feldspar, quartz, and mica. It is used for building countertops, flooring, and walls.
4. Shale - Shale is a fine-grained sedimentary rock that is often used for making bricks, tiles, and other building materials.
Correct Answer
The correct answer to the question is option 'B' - Shale. Shale is a type of sedimentary rock that is easily split into thin layers, making it ideal for making bricks and tiles. It is also a common material used for building walls and other structures.
Petroleum is formed deep inside the earth in millions of years by- a)Bacteria and fungi
- b)Dead plants and animals
- c)Rock and minerals
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Petroleum is formed deep inside the earth in millions of years by
a)
Bacteria and fungi
b)
Dead plants and animals
c)
Rock and minerals
d)
None of these
|
Aarushi gupta answered |
The correct answer is b) Dead plants and animals.
Petroleum is a fossil fuel that is formed from the remains of dead plants and animals that have been buried and subjected to high temperatures and pressures over millions of years. As these organic materials are subjected to heat and pressure, they undergo chemical reactions that transform them into hydrocarbons, which are the main component of petroleum. The hydrocarbons in petroleum can range from simple molecules like methane to more complex ones like gasoline and diesel.
Which of the following factors is not responsible for exhaustion of natural resources?
- a)Increase population
- b)Increased number of vehicles
- c)Increased use of renewable resources
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
Which of the following factors is not responsible for exhaustion of natural resources?
a)
Increase population
b)
Increased number of vehicles
c)
Increased use of renewable resources
d)
None of these
|
|
Rhea shah answered |
Understanding Resource Exhaustion
Natural resources are the materials that we obtain from the Earth, and their exhaustion can lead to significant environmental and economic issues. Let’s explore the reasons behind resource depletion and clarify why increased use of renewable resources is not a contributing factor.
Factors Contributing to Resource Exhaustion
- Increase in Population: A growing population leads to higher demand for resources such as water, energy, and food. More people require more natural resources to sustain their daily needs.
- Increased Number of Vehicles: The rise in vehicles contributes to the consumption of fossil fuels, which are non-renewable resources. This also results in increased pollution and environmental degradation, further straining available resources.
- Increased Use of Renewable Resources: This factor is crucial because renewable resources, such as solar and wind energy, are naturally replenished. Unlike fossil fuels, which can be depleted, renewable resources can be harnessed sustainably without exhausting them. Therefore, this does not contribute to the depletion of natural resources.
Conclusion
In summary, while population growth and vehicle usage significantly impact the exhaustion of natural resources, the increased use of renewable resources is a positive trend that helps protect and conserve non-renewable resources. By transitioning to renewable energy sources, we can promote sustainability and reduce our overall ecological footprint.
Natural resources are the materials that we obtain from the Earth, and their exhaustion can lead to significant environmental and economic issues. Let’s explore the reasons behind resource depletion and clarify why increased use of renewable resources is not a contributing factor.
Factors Contributing to Resource Exhaustion
- Increase in Population: A growing population leads to higher demand for resources such as water, energy, and food. More people require more natural resources to sustain their daily needs.
- Increased Number of Vehicles: The rise in vehicles contributes to the consumption of fossil fuels, which are non-renewable resources. This also results in increased pollution and environmental degradation, further straining available resources.
- Increased Use of Renewable Resources: This factor is crucial because renewable resources, such as solar and wind energy, are naturally replenished. Unlike fossil fuels, which can be depleted, renewable resources can be harnessed sustainably without exhausting them. Therefore, this does not contribute to the depletion of natural resources.
Conclusion
In summary, while population growth and vehicle usage significantly impact the exhaustion of natural resources, the increased use of renewable resources is a positive trend that helps protect and conserve non-renewable resources. By transitioning to renewable energy sources, we can promote sustainability and reduce our overall ecological footprint.
Fossil fuels are usually found- a)In the atmosphere
- b)Below the ground
- c)At the bottoms of sea
- d)Both (b) and (c)
Correct answer is option 'D'. Can you explain this answer?
Fossil fuels are usually found
a)
In the atmosphere
b)
Below the ground
c)
At the bottoms of sea
d)
Both (b) and (c)
|
Arka Gupta answered |
Below the Ground and at the Bottoms of Seas
Fossil fuels, such as coal, oil, and natural gas, are typically found below the ground and at the bottoms of seas. Here is a breakdown of where they are usually located:
Below the Ground:
- Coal: Coal is primarily found underground in coal mines. It is formed from the remains of plants that lived and died millions of years ago. The pressure and heat from the earth's crust turned these plant remains into coal over time.
- Oil: Oil is usually found deep underground in reservoirs. It is formed from the remains of tiny sea creatures that died and sank to the ocean floor millions of years ago. Over time, the pressure and heat transformed these remains into oil.
- Natural Gas: Like oil, natural gas is also found underground in reservoirs. It is formed from the same organic material as oil but at higher temperatures and pressures.
At the Bottoms of Seas:
- Some fossil fuels, particularly oil and natural gas, can also be found at the bottoms of seas and oceans. These deposits are usually the result of ancient marine organisms decaying and being buried under layers of sediment over millions of years.
In conclusion, fossil fuels are primarily located below the ground in mines and reservoirs, as well as at the bottoms of seas and oceans. These natural resources have played a crucial role in powering our society, but their extraction and use also have significant environmental impacts.
Fossil fuels, such as coal, oil, and natural gas, are typically found below the ground and at the bottoms of seas. Here is a breakdown of where they are usually located:
Below the Ground:
- Coal: Coal is primarily found underground in coal mines. It is formed from the remains of plants that lived and died millions of years ago. The pressure and heat from the earth's crust turned these plant remains into coal over time.
- Oil: Oil is usually found deep underground in reservoirs. It is formed from the remains of tiny sea creatures that died and sank to the ocean floor millions of years ago. Over time, the pressure and heat transformed these remains into oil.
- Natural Gas: Like oil, natural gas is also found underground in reservoirs. It is formed from the same organic material as oil but at higher temperatures and pressures.
At the Bottoms of Seas:
- Some fossil fuels, particularly oil and natural gas, can also be found at the bottoms of seas and oceans. These deposits are usually the result of ancient marine organisms decaying and being buried under layers of sediment over millions of years.
In conclusion, fossil fuels are primarily located below the ground in mines and reservoirs, as well as at the bottoms of seas and oceans. These natural resources have played a crucial role in powering our society, but their extraction and use also have significant environmental impacts.
Basalt is an igneous rock formed by lava cooling on the earth's surface. It is dense and ____.- a)soft
- b)light
- c)dark
- d)smooth
Correct answer is option 'C'. Can you explain this answer?
Basalt is an igneous rock formed by lava cooling on the earth's surface. It is dense and ____.
a)
soft
b)
light
c)
dark
d)
smooth
|
Torcia Education answered |
Basalt is an igneous rock that is dense and dark in color. It has fine grains and is formed by lava cooling on the earth's surface.
Black gold is the name given to which natural resource?
- a)Gold
- b)Petroleum
- c)Biogas
- d)Natural gas
Correct answer is option 'B'. Can you explain this answer?
Black gold is the name given to which natural resource?
a)
Gold
b)
Petroleum
c)
Biogas
d)
Natural gas
|
Kapil answered |
No answer is not b it is c petroleum is called black gold you can check it on internet
Read the given statementsStatement I: Clay is the smallest particle of soil.Statement II: Sand is the smallest particle of soil.Q. Which of the following is correct about the above statements?- a)I is true
- b)II is true
- c)Both I and II are true
- d)Both I and II are false
Correct answer is option 'A'. Can you explain this answer?
Read the given statements
Statement I: Clay is the smallest particle of soil.
Statement II: Sand is the smallest particle of soil.
Q. Which of the following is correct about the above statements?
a)
I is true
b)
II is true
c)
Both I and II are true
d)
Both I and II are false
|
Aman Mehta answered |
Statement I: Clay is the smallest particle of soil.
Clay is a type of soil particle that is very small in size. It is classified as a fine-grained soil particle. Clay particles are less than 0.002 mm in diameter, making them smaller than sand and silt particles. They are so tiny that they cannot be seen with the naked eye.
Statement II: Sand is the smallest particle of soil.
This statement is incorrect. Sand is actually the largest particle size among the three main types of soil particles: sand, silt, and clay. Sand particles range in size from 0.05 mm to 2.0 mm in diameter. They are visible to the naked eye and have a gritty texture.
Explanation:
The correct answer is option 'A', which states that only Statement I is true. This is because clay is indeed the smallest particle of soil, while sand is the largest.
Key Points:
- Clay is the smallest particle of soil, with a diameter of less than 0.002 mm.
- Sand is the largest particle of soil, ranging in size from 0.05 mm to 2.0 mm.
- Clay particles are not visible to the naked eye, while sand particles are.
- Clay has a smooth texture, while sand has a gritty texture.
- The three main types of soil particles are sand, silt, and clay.
- Silt particles are intermediate in size between sand and clay. They range from 0.002 mm to 0.05 mm in diameter.
Clay is a type of soil particle that is very small in size. It is classified as a fine-grained soil particle. Clay particles are less than 0.002 mm in diameter, making them smaller than sand and silt particles. They are so tiny that they cannot be seen with the naked eye.
Statement II: Sand is the smallest particle of soil.
This statement is incorrect. Sand is actually the largest particle size among the three main types of soil particles: sand, silt, and clay. Sand particles range in size from 0.05 mm to 2.0 mm in diameter. They are visible to the naked eye and have a gritty texture.
Explanation:
The correct answer is option 'A', which states that only Statement I is true. This is because clay is indeed the smallest particle of soil, while sand is the largest.
Key Points:
- Clay is the smallest particle of soil, with a diameter of less than 0.002 mm.
- Sand is the largest particle of soil, ranging in size from 0.05 mm to 2.0 mm.
- Clay particles are not visible to the naked eye, while sand particles are.
- Clay has a smooth texture, while sand has a gritty texture.
- The three main types of soil particles are sand, silt, and clay.
- Silt particles are intermediate in size between sand and clay. They range from 0.002 mm to 0.05 mm in diameter.
Water and wind can break rock into smaller pieces. What happens to these pieces when they break up?- a)Plants use them for energy.
- b)They become part of the soil.
- c)They become food for animals.
- d)They turn into earthworms.
Correct answer is option 'B'. Can you explain this answer?
Water and wind can break rock into smaller pieces. What happens to these pieces when they break up?
a)
Plants use them for energy.
b)
They become part of the soil.
c)
They become food for animals.
d)
They turn into earthworms.
|
|
Niti verma answered |
What happens to the pieces when rocks break up?
When rocks are broken up by water and wind, the smaller pieces that are produced are not simply discarded or destroyed. Instead, they go through a natural process that allows them to become an essential part of the environment. The correct answer to the question is option 'B' - they become part of the soil. Let's explore this in more detail.
1. Weathering and erosion:
- Water and wind are agents of weathering and erosion, meaning they have the ability to break down rocks into smaller pieces.
- Water enters the cracks and crevices of rocks, and when it freezes and expands, it exerts pressure that causes the rock to break apart.
- Wind can carry small particles such as sand, which can act as abrasives, wearing down rocks over time.
2. Formation of soil:
- The smaller pieces of rock that result from weathering and erosion are called sediment.
- Sediment can vary in size, from tiny particles like clay to larger fragments like sand and gravel.
- Over time, these sediments accumulate and mix with organic matter, such as dead plants and animals, to form soil.
- The process of soil formation is called pedogenesis.
3. Importance of soil:
- Soil is a vital resource for plants, animals, and humans.
- It provides a medium for plant growth, supplying nutrients, water, and anchorage for roots.
- Soil also serves as a habitat for a wide range of organisms, including earthworms, insects, microorganisms, and burrowing animals.
- It acts as a filter, purifying water as it percolates through the soil layers.
4. Nutrient cycling:
- As rocks break down and become part of the soil, they release minerals and nutrients that are essential for plant growth.
- This process, known as nutrient cycling, ensures that these vital elements are continuously recycled and available for use by living organisms.
Conclusion:
In summary, when rocks break up due to the forces of water and wind, the smaller pieces become part of the soil. This process is important for the formation of soil, which provides essential nutrients and support for plant growth, serves as a habitat for various organisms, and plays a crucial role in nutrient cycling.
When rocks are broken up by water and wind, the smaller pieces that are produced are not simply discarded or destroyed. Instead, they go through a natural process that allows them to become an essential part of the environment. The correct answer to the question is option 'B' - they become part of the soil. Let's explore this in more detail.
1. Weathering and erosion:
- Water and wind are agents of weathering and erosion, meaning they have the ability to break down rocks into smaller pieces.
- Water enters the cracks and crevices of rocks, and when it freezes and expands, it exerts pressure that causes the rock to break apart.
- Wind can carry small particles such as sand, which can act as abrasives, wearing down rocks over time.
2. Formation of soil:
- The smaller pieces of rock that result from weathering and erosion are called sediment.
- Sediment can vary in size, from tiny particles like clay to larger fragments like sand and gravel.
- Over time, these sediments accumulate and mix with organic matter, such as dead plants and animals, to form soil.
- The process of soil formation is called pedogenesis.
3. Importance of soil:
- Soil is a vital resource for plants, animals, and humans.
- It provides a medium for plant growth, supplying nutrients, water, and anchorage for roots.
- Soil also serves as a habitat for a wide range of organisms, including earthworms, insects, microorganisms, and burrowing animals.
- It acts as a filter, purifying water as it percolates through the soil layers.
4. Nutrient cycling:
- As rocks break down and become part of the soil, they release minerals and nutrients that are essential for plant growth.
- This process, known as nutrient cycling, ensures that these vital elements are continuously recycled and available for use by living organisms.
Conclusion:
In summary, when rocks break up due to the forces of water and wind, the smaller pieces become part of the soil. This process is important for the formation of soil, which provides essential nutrients and support for plant growth, serves as a habitat for various organisms, and plays a crucial role in nutrient cycling.
What type of rock is formed when magma cools below the surface of the earth and has larger grains than basalt?- a)Igneous rock
- b)Sedimentary rock
- c)Metamorphic rock
- d)Granite
Correct answer is option 'D'. Can you explain this answer?
a)
Igneous rock
b)
Sedimentary rock
c)
Metamorphic rock
d)
Granite
|
Athul Malik answered |
Introduction to Igneous Rocks
Igneous rocks are formed from the solidification of molten rock material called magma. When magma cools and solidifies beneath the Earth's surface, it forms intrusive igneous rocks.
Granite: A Common Intrusive Igneous Rock
Granite is a prime example of an intrusive igneous rock. Here’s why it fits the criteria:
Conclusion
The characteristics of granite, such as its formation process and larger grain size compared to basalt, confirm that it is an intrusive igneous rock. This makes option 'D', Granite, the correct answer to the question posed. Understanding these properties helps in identifying and classifying different types of rocks in geology.
Igneous rocks are formed from the solidification of molten rock material called magma. When magma cools and solidifies beneath the Earth's surface, it forms intrusive igneous rocks.
Granite: A Common Intrusive Igneous Rock
Granite is a prime example of an intrusive igneous rock. Here’s why it fits the criteria:
- Cooling Location: Granite forms when magma cools slowly beneath the Earth's surface.
- Grain Size: The slow cooling allows larger mineral grains to develop, giving granite a coarse texture.
- Composition: Granite is primarily composed of quartz, feldspar, and mica, which contribute to its light color and speckled appearance.
- Comparison with Basalt: In contrast, basalt forms from lava that cools quickly on the surface, resulting in smaller grains.
Conclusion
The characteristics of granite, such as its formation process and larger grain size compared to basalt, confirm that it is an intrusive igneous rock. This makes option 'D', Granite, the correct answer to the question posed. Understanding these properties helps in identifying and classifying different types of rocks in geology.
Van Mahotsav is celebrated to- a)Celebrate cutting of trees
- b)For saving trees
- c)Save the animals
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Van Mahotsav is celebrated to
a)
Celebrate cutting of trees
b)
For saving trees
c)
Save the animals
d)
None of these
|
|
KDLSR Sharma answered |
Answer is B because Van means jungle and Jungle means trees so answer is B
Mineral(s) is / are used for- a)Fertilizers
- b)Gemstones
- c)Metal extract
- d)All of these
Correct answer is option 'D'. Can you explain this answer?
Mineral(s) is / are used for
a)
Fertilizers
b)
Gemstones
c)
Metal extract
d)
All of these
|
Dhaval pandey answered |
The correct answer is option 'D'. Minerals have a wide range of uses, and are used for different purposes. They are used in fertilizers, gemstones, and metal extraction. Fertilizers are used to enhance the growth of plants and to improve crop yields, Gemstones are used in jewelry, and metal extraction is the process of obtaining metals from their ores. All of these uses are different but they all come under the category of mineral's uses.
Fossil fuels are formed over a long period of time, because of heat and pressure. What was the original things which gets converted to fossil fuels?- a)Nitrogen mixed with water
- b)Carbon filtered through limestone
- c)Organisms buried inside the earth
- d)Bacteria on the mud surface
Correct answer is option 'C'. Can you explain this answer?
Fossil fuels are formed over a long period of time, because of heat and pressure. What was the original things which gets converted to fossil fuels?
a)
Nitrogen mixed with water
b)
Carbon filtered through limestone
c)
Organisms buried inside the earth
d)
Bacteria on the mud surface
|
Sarthak.D.Master answered |
C is correct
Lava cools to form.- a)Sand stone
- b)Igneous rock
- c)Sedimentary rocks
- d)Metamorphic rock
Correct answer is option 'B'. Can you explain this answer?
Lava cools to form.
a)
Sand stone
b)
Igneous rock
c)
Sedimentary rocks
d)
Metamorphic rock
|
Apurwa Prakash answered |
Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. ... When lava comes out of a volcano and solidifies into extrusive igneous rock, also called volcanic, the rock cools very quickly.
Marble is formed from _______.- a)Granite
- b)Sandstone
- c)Limestone
- d)Basalt
Correct answer is option 'C'. Can you explain this answer?
Marble is formed from _______.
a)
Granite
b)
Sandstone
c)
Limestone
d)
Basalt
|
Headway Institute answered |
Marble is made from limestone. Limestone is a type of rock that can be easily carved and polished into various shapes. Marble is often used to make statues and buildings, like the famous Taj Mahal, which is made of white marble.
Which of the following is the hardest rock?- a)Plastic
- b)Graphite
- c)Diamond
- d)Gemstone
Correct answer is option 'C'. Can you explain this answer?
Which of the following is the hardest rock?
a)
Plastic
b)
Graphite
c)
Diamond
d)
Gemstone
|
Pranav Singh answered |
Diamond is the hardest rock.
Match the following rocks in Column-1 with their uses in Column-II.
- a)p-i, q-iii, r-iv, s-ii
- b)p-iv, q-iii, r-ii, s-i
- c)p-iii, q-iv, r-i, s-ii
- d)p-i, q-ii, r-iii, s-iv
Correct answer is option 'C'. Can you explain this answer?
Match the following rocks in Column-1 with their uses in Column-II.
a)
p-i, q-iii, r-iv, s-ii
b)
p-iv, q-iii, r-ii, s-i
c)
p-iii, q-iv, r-i, s-ii
d)
p-i, q-ii, r-iii, s-iv
|
|
Pranav Singh answered |
The correct combinations are graphite - pencil lead, marble - statues, diamond - jewellery, sandstone - redfort.
Coal is formed from the remains of ______.
- a)Trees
- b)Animals
- c)Rocks
- d)Rivers
Correct answer is option 'A'. Can you explain this answer?
Coal is formed from the remains of ______.
a)
Trees
b)
Animals
c)
Rocks
d)
Rivers
|
Rohini Seth answered |
Coal is formed from the remains of trees. Millions of years ago, thick forests on earth, growing in swamps, eventually turned into coal as the trees died and got buried under layers of sand, mud, and more dead trees.
Building blocks of rocks are- a)Sand
- b)Pebbles
- c)Stone
- d)Minerals
Correct answer is option 'D'. Can you explain this answer?
Building blocks of rocks are
a)
Sand
b)
Pebbles
c)
Stone
d)
Minerals
|
|
Mehul Kapoor answered |
Building blocks of rocks:
Rocks are composed of various substances and materials that are classified into several building blocks. These building blocks are the fundamental components that make up rocks. The correct answer to this question is option D, minerals. Let's discuss each option in detail to understand why minerals are considered the building blocks of rocks.
Sand:
Sand is a granular material composed of small rock and mineral particles. It is primarily made up of fragments of minerals, rocks, and shells. While sand is a component of rocks, it is not considered a building block itself because it is made up of a mixture of various materials rather than a single substance.
Pebbles:
Pebbles are small, rounded rocks that are larger than sand but smaller than stones. They are often found along riverbeds and shorelines. Pebbles are made up of different types of rocks, minerals, and sometimes fossils. Similar to sand, pebbles are not considered building blocks on their own as they are composed of a mixture of materials.
Stone:
Stone is a general term used to describe any solid, naturally occurring substance composed of minerals. It refers to rocks that are large and hard, usually used for construction purposes. While stones can be considered building blocks, they are not as specific as minerals, which are the individual components that make up rocks.
Minerals:
Minerals are the building blocks of rocks. They are naturally occurring, inorganic substances that have a specific chemical composition and a crystal structure. Minerals can be found in various types of rocks and are the primary components that give rocks their unique characteristics. Different minerals have different properties, such as color, hardness, and luster, which contribute to the overall appearance and composition of rocks.
In conclusion, minerals are the correct answer as they are the fundamental components that make up rocks. While sand, pebbles, and stones are all associated with rocks, they are not considered building blocks themselves as they are composed of mixtures or larger aggregates of minerals and rocks.
Rocks are composed of various substances and materials that are classified into several building blocks. These building blocks are the fundamental components that make up rocks. The correct answer to this question is option D, minerals. Let's discuss each option in detail to understand why minerals are considered the building blocks of rocks.
Sand:
Sand is a granular material composed of small rock and mineral particles. It is primarily made up of fragments of minerals, rocks, and shells. While sand is a component of rocks, it is not considered a building block itself because it is made up of a mixture of various materials rather than a single substance.
Pebbles:
Pebbles are small, rounded rocks that are larger than sand but smaller than stones. They are often found along riverbeds and shorelines. Pebbles are made up of different types of rocks, minerals, and sometimes fossils. Similar to sand, pebbles are not considered building blocks on their own as they are composed of a mixture of materials.
Stone:
Stone is a general term used to describe any solid, naturally occurring substance composed of minerals. It refers to rocks that are large and hard, usually used for construction purposes. While stones can be considered building blocks, they are not as specific as minerals, which are the individual components that make up rocks.
Minerals:
Minerals are the building blocks of rocks. They are naturally occurring, inorganic substances that have a specific chemical composition and a crystal structure. Minerals can be found in various types of rocks and are the primary components that give rocks their unique characteristics. Different minerals have different properties, such as color, hardness, and luster, which contribute to the overall appearance and composition of rocks.
In conclusion, minerals are the correct answer as they are the fundamental components that make up rocks. While sand, pebbles, and stones are all associated with rocks, they are not considered building blocks themselves as they are composed of mixtures or larger aggregates of minerals and rocks.
Which of the following is used to make pencil lead?- a)Gemstone
- b)Graphite
- c)Diamond
- d)Garnet
Correct answer is option 'B'. Can you explain this answer?
Which of the following is used to make pencil lead?
a)
Gemstone
b)
Graphite
c)
Diamond
d)
Garnet
|
|
Pranav Singh answered |
Graphite is used to make pencil lead.
Which of the following describes the rock cycle?- a) The formation of rocks from magma only
- b) The mining of minerals from rocks
- c) The breakdown of rocks into soil
- d) The continuous transformation of rocks from one type to another
Correct answer is option 'D'. Can you explain this answer?
Which of the following describes the rock cycle?
a)
The formation of rocks from magma only
b)
The mining of minerals from rocks
c)
The breakdown of rocks into soil
d)
The continuous transformation of rocks from one type to another
|
Nclex Coaching Centre answered |
The rock cycle illustrates the continuous process through which rocks change from one type to another over time, including igneous, sedimentary, and metamorphic forms, driven by geological processes.
Which type of rock is formed from the cooling and solidification of molten magma?- a) Igneous Rock
- b) Fossil Rock
- c) Metamorphic Rock
- d) Sedimentary Rock
Correct answer is option 'A'. Can you explain this answer?
Which type of rock is formed from the cooling and solidification of molten magma?
a)
Igneous Rock
b)
Fossil Rock
c)
Metamorphic Rock
d)
Sedimentary Rock
|
|
Nclex Coaching Centre answered |
Igneous rocks are formed through the cooling and solidification of molten magma, either beneath the Earth's surface (intrusive) or on the surface (extrusive). They are the primary type of rock and serve as the foundation for other rock types.
Which of the following is an example of an intrusive igneous rock?- a) Basalt
- b) Pumice
- c) Granite
- d) Obsidian
Correct answer is option 'C'. Can you explain this answer?
Which of the following is an example of an intrusive igneous rock?
a)
Basalt
b)
Pumice
c)
Granite
d)
Obsidian
|
|
Nclex Coaching Centre answered |
Granite is an example of an intrusive igneous rock, formed from magma that cools slowly beneath the Earth's surface, resulting in large crystals. In contrast, basalt is an extrusive igneous rock that cools quickly on the surface.
Which of the following is used as a fuel?- a)Coal
- b)Chalk
- c)Slate
- d)Granite
Correct answer is option 'A'. Can you explain this answer?
Which of the following is used as a fuel?
a)
Coal
b)
Chalk
c)
Slate
d)
Granite
|
|
Pranav Singh answered |
Coal is a black rock. It is used as a fuel.
What are the basic types of rocks found on earth?- a)Igneous, sedimentary, metamorphic
- b)Volcanic, plutonic, extrusive
- c)Gneiss, basalt, obsidian
- d)Condensation and heat
Correct answer is option 'A'. Can you explain this answer?
What are the basic types of rocks found on earth?
a)
Igneous, sedimentary, metamorphic
b)
Volcanic, plutonic, extrusive
c)
Gneiss, basalt, obsidian
d)
Condensation and heat
|
|
Rohini Seth answered |
The three basic types of rocks found on Earth are igneous, sedimentary, and metamorphic. These categories are based on the processes through which the rocks are formed.
State whether the following statement is True or False:All rocks on Earth are made up of only one mineral.- a)True
- b)False
Correct answer is option 'B'. Can you explain this answer?
State whether the following statement is True or False:
All rocks on Earth are made up of only one mineral.
a)
True
b)
False
|
|
Rohini Seth answered |
- Rocks on Earth are made up of different minerals and not just one mineral.
- Some rocks can contain up to six or more minerals, giving them different colors and properties.
- So, the statement that all rocks are made up of only one mineral is False.
Regarding soil, which of the following statements is true?- a) The A-horizon of soil contains the maximum humus.
- b) The B-horizon of soil contains the most organic matter.
- c) The C-horizon of soil contains the maximum humus.
- d) The D-horizon of soil is rich in humus.
Correct answer is option 'A'. Can you explain this answer?
a)
The A-horizon of soil contains the maximum humus.
b)
The B-horizon of soil contains the most organic matter.
c)
The C-horizon of soil contains the maximum humus.
d)
The D-horizon of soil is rich in humus.
|
Kds Coaching answered |
The A-horizon, also called the topsoil, contains the highest amount of humus and organic matter. Humus forms from the decomposition of plant and animal material, making the A-horizon rich and fertile. The B-horizon is the subsoil and usually has fewer nutrients and less organic matter. The C-horizon mainly consists of weathered parent rock and has very little humus. The D-horizon, if present, is the bedrock and contains no humus. Therefore, the A-horizon of soil contains the maximum humus.
Which of the following is a characteristic of extrusive igneous rocks?- a) Formed underground
- b) High silica content
- c) Rapid cooling
- d) Coarse-grained texture
Correct answer is option 'C'. Can you explain this answer?
Which of the following is a characteristic of extrusive igneous rocks?
a)
Formed underground
b)
High silica content
c)
Rapid cooling
d)
Coarse-grained texture
|
|
Nclex Coaching Centre answered |
Extrusive igneous rocks cool rapidly on the Earth's surface, resulting in a fine-grained texture. An example is basalt, which is commonly found in volcanic areas.
What term describes the process of high pressure and temperature transforming existing rocks into metamorphic rocks?- a) Crystallization
- b) Lithification
- c) Metamorphism
- d) Erosion
Correct answer is option 'C'. Can you explain this answer?
What term describes the process of high pressure and temperature transforming existing rocks into metamorphic rocks?
a)
Crystallization
b)
Lithification
c)
Metamorphism
d)
Erosion
|
|
Nclex Coaching Centre answered |
Metamorphism is the process that alters the mineral composition and structure of existing rocks due to high pressure and temperature, resulting in the formation of metamorphic rocks.
Which of the following natural resources provides raw materials for plastic paint, fertilizers and cosmetics?- a)Coal
- b)Limestone
- c)Petroleum
- d)Peat
Correct answer is option 'C'. Can you explain this answer?
Which of the following natural resources provides raw materials for plastic paint, fertilizers and cosmetics?
a)
Coal
b)
Limestone
c)
Petroleum
d)
Peat
|
|
Rohini Seth answered |
Petroleum (crude oil) is a critical raw material for many industries. It is refined to produce various products, including:
- Plastic: Derived from petrochemicals like ethylene, propylene, and others, which are essential in plastic production.
- Paint: Petroleum products are used in making the solvents and resins for paints.
- Fertilizers: Petrochemicals such as ammonia, derived from natural gas (a petroleum product), are used in making fertilizers.
- Cosmetics: Many cosmetic products are made using petrochemical derivatives, such as mineral oils and synthetic chemicals.
Which of these is/are formed from rocks?- a)Pebbles
- b)Stones
- c)Sand
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
Which of these is/are formed from rocks?
a)
Pebbles
b)
Stones
c)
Sand
d)
All of the above
|
|
Pranav Singh answered |
Rocks break up to form stones, pebbles, sand and soil.
What type of rock is formed from the accumulation of marine organisms' remains?- a) Volcanic Rock
- b) Sedimentary Rock
- c) Igneous Rock
- d) Metamorphic Rock
Correct answer is option 'B'. Can you explain this answer?
What type of rock is formed from the accumulation of marine organisms' remains?
a)
Volcanic Rock
b)
Sedimentary Rock
c)
Igneous Rock
d)
Metamorphic Rock
|
|
Nclex Coaching Centre answered |
Sedimentary rocks, such as limestone, are formed from the accumulation of the remains of marine organisms, including shells and skeletons, over time. This process highlights the importance of biological activity in rock formation.
What is the process called when sediments are bound together to form sedimentary rock?- a) Erosion
- b) Metamorphism
- c) Weathering
- d) Lithification
Correct answer is option 'D'. Can you explain this answer?
What is the process called when sediments are bound together to form sedimentary rock?
a)
Erosion
b)
Metamorphism
c)
Weathering
d)
Lithification
|
|
Nclex Coaching Centre answered |
Lithification is the process of compacting and cementing loose sediments to form solid sedimentary rocks. It involves both compaction under pressure and the binding of particles together by natural cements.
Which of the following types of rocks is most likely to contain fossils?- a) Volcanic Rock
- b) Igneous Rock
- c) Metamorphic Rock
- d) Sedimentary Rock
Correct answer is option 'D'. Can you explain this answer?
Which of the following types of rocks is most likely to contain fossils?
a)
Volcanic Rock
b)
Igneous Rock
c)
Metamorphic Rock
d)
Sedimentary Rock
|
|
Nclex Coaching Centre answered |
Sedimentary rocks are most likely to contain fossils, as they are formed from the accumulation of sediments, including organic remains, which can be preserved over time. Fossils provide valuable insights into the history of life on Earth.
What distinguishes rocks from minerals?- a) Rocks are always crystalline, while minerals are not.
- b) Rocks are organic, while minerals are inorganic.
- c) Rocks have a definite chemical composition, while minerals do not.
- d) Rocks may consist of multiple minerals, while minerals consist of a single chemical compound.
Correct answer is option 'D'. Can you explain this answer?
What distinguishes rocks from minerals?
a)
Rocks are always crystalline, while minerals are not.
b)
Rocks are organic, while minerals are inorganic.
c)
Rocks have a definite chemical composition, while minerals do not.
d)
Rocks may consist of multiple minerals, while minerals consist of a single chemical compound.
|
|
Nclex Coaching Centre answered |
Rocks are composed of one or more minerals and do not have a definite chemical composition, whereas minerals have a specific chemical structure and composition. This distinction is fundamental in geology.
What type of metamorphism occurs due to extreme heat from nearby magma?- a) Thermal Metamorphism
- b) Dynamic Metamorphism
- c) Contact Metamorphism
- d) Regional Metamorphism
Correct answer is option 'A'. Can you explain this answer?
What type of metamorphism occurs due to extreme heat from nearby magma?
a)
Thermal Metamorphism
b)
Dynamic Metamorphism
c)
Contact Metamorphism
d)
Regional Metamorphism
|
|
Nclex Coaching Centre answered |
Thermal metamorphism occurs when rocks are subjected to extreme heat from magma or lava, leading to changes in mineral composition and texture. This type of metamorphism typically affects rocks in close proximity to igneous intrusions.
Igneous rocks is formed by- a)Burning of rocks
- b)Correction of other rocks
- c)Cooling down of lava from volcano
- d) All of these
Correct answer is option 'C'. Can you explain this answer?
Igneous rocks is formed by
a)
Burning of rocks
b)
Correction of other rocks
c)
Cooling down of lava from volcano
d)
All of these
|
Learning Education answered |
Answer:
- Magma Generation: Magma is generated in the Earth's mantle through processes such as melting of rocks due to increased temperature or addition of volatiles.
- Magma Migration: Magma rises towards the Earth's surface through cracks and fissures in the crust. It can also accumulate in magma chambers beneath volcanoes.
- Lava Eruption: When magma reaches the surface, it is called lava. Lava can erupt from volcanoes or flow out through cracks in the Earth's surface.
- Cooling and Solidification: As lava is exposed to the cooler temperatures of the Earth's surface or water bodies, it begins to cool down. The cooling process results in the solidification of the lava, forming igneous rocks.
- Extrusive Igneous Rocks: These rocks are formed from lava that cools down quickly on the Earth's surface. Examples include basalt and obsidian.
- Intrusive Igneous Rocks: These rocks are formed from magma that cools down slowly beneath the Earth's surface. Examples include granite and gabbro.
Igneous rocks are formed by the cooling down of lava from a volcano.
Explanation:
Igneous rocks are one of the three main types of rocks, along with sedimentary and metamorphic rocks. They are formed through the solidification and cooling of molten rock material, known as magma or lava.
The process of formation of igneous rocks involves the following steps:
- Magma Generation: Magma is generated in the Earth's mantle through processes such as melting of rocks due to increased temperature or addition of volatiles.
- Magma Migration: Magma rises towards the Earth's surface through cracks and fissures in the crust. It can also accumulate in magma chambers beneath volcanoes.
- Lava Eruption: When magma reaches the surface, it is called lava. Lava can erupt from volcanoes or flow out through cracks in the Earth's surface.
- Cooling and Solidification: As lava is exposed to the cooler temperatures of the Earth's surface or water bodies, it begins to cool down. The cooling process results in the solidification of the lava, forming igneous rocks.
Types of Igneous Rocks:
- Extrusive Igneous Rocks: These rocks are formed from lava that cools down quickly on the Earth's surface. Examples include basalt and obsidian.
- Intrusive Igneous Rocks: These rocks are formed from magma that cools down slowly beneath the Earth's surface. Examples include granite and gabbro.
In conclusion, igneous rocks are formed by the cooling down of lava from a volcano. This process of solidification and cooling leads to the formation of various types of igneous rocks with different textures and mineral compositions.
Which of the following rocks is used in jewellery?- a)Graphite
- b)Silica
- c)Diamond
- d)Gypsum
Correct answer is option 'C'. Can you explain this answer?
Which of the following rocks is used in jewellery?
a)
Graphite
b)
Silica
c)
Diamond
d)
Gypsum
|
|
Pranav Singh answered |
Diamond is the precious rock. It is used in jewellery.
Rocks are composed of naturally occurring substances called ________.- a)Water
- b)Minerals
- c)Air
- d)Plants
Correct answer is option 'B'. Can you explain this answer?
Rocks are composed of naturally occurring substances called ________.
a)
Water
b)
Minerals
c)
Air
d)
Plants
|
|
Nclex Coaching Centre answered |
Minerals are the natural substances that make up rocks. They are like tiny building blocks that join together to form rocks. So, rocks are made up of minerals that come together in different ways and colors.
Which of the following is a sedimentary rock?- a)Slate
- b)Marble
- c)Granite
- d)Sand stone
Correct answer is option 'D'. Can you explain this answer?
Which of the following is a sedimentary rock?
a)
Slate
b)
Marble
c)
Granite
d)
Sand stone
|
|
Madhavan Joshi answered |
Sedimentary Rock:
A sedimentary rock is a type of rock that is formed from the accumulation of sediments. Sediments are small particles of minerals, rocks, and organic matter that are transported and deposited by wind, water, or ice. Over time, these sediments are compacted and cemented together to form sedimentary rocks.
Sandstone:
Sandstone is a type of sedimentary rock that is made up of sand-sized grains of minerals, rock fragments, and organic matter. It is formed in environments such as beaches, deserts, and riverbeds, where there is a large amount of sand. Over time, as the sand is deposited and buried, it becomes compacted and the grains are cemented together by minerals such as silica or calcite.
Explanation:
Among the given options, the only rock that is a sedimentary rock is sandstone. Let's take a look at the other options:
- Slate: Slate is a metamorphic rock that is formed from the metamorphism of shale or mudstone. It undergoes a process called foliation, where the minerals align in parallel layers, giving it a characteristic layered appearance.
- Marble: Marble is a metamorphic rock that is formed from the metamorphism of limestone or dolomite. It is composed mainly of the mineral calcite and has a distinctive crystalline structure.
- Granite: Granite is an igneous rock that is formed from the cooling and solidification of magma or lava. It is composed mainly of the minerals quartz, feldspar, and mica, and has a coarse-grained texture.
Therefore, the correct answer is option D, sandstone, as it is the only sedimentary rock among the given options.
A sedimentary rock is a type of rock that is formed from the accumulation of sediments. Sediments are small particles of minerals, rocks, and organic matter that are transported and deposited by wind, water, or ice. Over time, these sediments are compacted and cemented together to form sedimentary rocks.
Sandstone:
Sandstone is a type of sedimentary rock that is made up of sand-sized grains of minerals, rock fragments, and organic matter. It is formed in environments such as beaches, deserts, and riverbeds, where there is a large amount of sand. Over time, as the sand is deposited and buried, it becomes compacted and the grains are cemented together by minerals such as silica or calcite.
Explanation:
Among the given options, the only rock that is a sedimentary rock is sandstone. Let's take a look at the other options:
- Slate: Slate is a metamorphic rock that is formed from the metamorphism of shale or mudstone. It undergoes a process called foliation, where the minerals align in parallel layers, giving it a characteristic layered appearance.
- Marble: Marble is a metamorphic rock that is formed from the metamorphism of limestone or dolomite. It is composed mainly of the mineral calcite and has a distinctive crystalline structure.
- Granite: Granite is an igneous rock that is formed from the cooling and solidification of magma or lava. It is composed mainly of the minerals quartz, feldspar, and mica, and has a coarse-grained texture.
Therefore, the correct answer is option D, sandstone, as it is the only sedimentary rock among the given options.
Which of the following is NOT a type of igneous rock?- a) Pumice
- b) Basalt
- c) Granite
- d) Gneiss
Correct answer is option 'D'. Can you explain this answer?
Which of the following is NOT a type of igneous rock?
a)
Pumice
b)
Basalt
c)
Granite
d)
Gneiss
|
|
Nclex Coaching Centre answered |
Gneiss is a metamorphic rock, whereas basalt, granite, and pumice are types of igneous rocks. Understanding the classification of rocks helps in identifying their origins and characteristics.
Which metamorphic rock is formed from the transformation of limestone?- a) Slate
- b) Marble
- c) Gneiss
- d) Quartzite
Correct answer is option 'B'. Can you explain this answer?
Which metamorphic rock is formed from the transformation of limestone?
a)
Slate
b)
Marble
c)
Gneiss
d)
Quartzite
|
|
Nclex Coaching Centre answered |
Marble is formed from the metamorphism of limestone under high temperatures and pressures. This process alters the mineral structure, resulting in a rock that is often used in sculptures and buildings due to its aesthetic qualities.
How do mechanical metamorphism and chemical metamorphism differ?- a) Mechanical metamorphism results in new minerals; chemical metamorphism does not.
- b) Mechanical metamorphism occurs under high temperature; chemical metamorphism does not.
- c) Mechanical metamorphism changes the rock's texture; chemical metamorphism involves mineral changes.
- d) Mechanical metamorphism is faster than chemical metamorphism.
Correct answer is option 'C'. Can you explain this answer?
How do mechanical metamorphism and chemical metamorphism differ?
a)
Mechanical metamorphism results in new minerals; chemical metamorphism does not.
b)
Mechanical metamorphism occurs under high temperature; chemical metamorphism does not.
c)
Mechanical metamorphism changes the rock's texture; chemical metamorphism involves mineral changes.
d)
Mechanical metamorphism is faster than chemical metamorphism.
|
|
Nclex Coaching Centre answered |
Mechanical metamorphism primarily changes the texture of rocks through physical processes such as crushing, while chemical metamorphism involves chemical reactions that change the mineral composition of the rocks.
Chapter doubts & questions for Rocks - Basic Science for Primary 5 2025 is part of Primary 5 exam preparation. The chapters have been prepared according to the Primary 5 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Primary 5 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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Basic Science for Primary 5
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