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Solved CBSE Class 7 Geography Chapter 2 Assertion and Reason Questions – Inside Our Earth. Here we (Net Explanations) working very hard to providing you with the Important Assertion Reason Questions for this Chapter.
Assertion and Reason Questions – Inside Our Earth
Q.1.) There are two statements given below, marked as Assertions (A) and Reasons (R) . Read the statements and choose the correct option.
- Assertion (A): The uppermost layer over the Earth’s surface is called Crust.
- Reason (R) : The thinnest layer of all the layers of the earth’s surface is its uppermost layer.
a.) Only A is correct
b.) Both A and R are correct and R explains A
c.) Only R is correct
d.) Both are incorrect
Answer: Both A and R are correct and R explains A
- Assertion (A): Main mineral constituents of the continental mass is Silica.
- Reason (R) : Si stands for Silica and Ma stands for magnesium
a.) Both A and R are correct but does not explains each other
b.) A and R clearly explains each other
c.) Only R is correct
d.) Both are incorrect
Answer: Both A and R are correct but does not explains each other
- Assertion (A): Below the Earth’s crust lies the mantle which extends up to 2900 km below the crust.
- Reason (R) : Mantle lies just below the crust and above the core.
a.) Both A and R are correct and R explains A clearly
b.) Only R is correct
c.) Both A and R are incorrect
d.) Only A is correct
Answer: Both A and R are correct and R explains A clearly.
- Assertion (A): Core is the innermost layer with a radius of 3500 km and is made of nickel and iron.
- Reason (R) : Core is made of NiFe
a.) Both A and R are correct and explain each other.
b.) Only A is correct
c.) A and R both are incorrect.
d.) Both are correct but do not support each other.
Answer: Both A and R are correct and explain each other.
- Assertion (A): Any natural mass of mineral matter that makes up the Earth’s crust is called a rock.
- Reason (R) : Earth’s crust is made up of various gasses and chemical substances.
a.) Only R is correct
b.) Both A and R are correct
c.) Only A is correct
d.) Both the cases are incorrect
Answer: Only A is correct
- Assertion (A): When molten magma cools, it becomes solid and hence igneous rocks are formed.
- Reason (R) : Igneous rocks are called primary rocks because they were first formed from the Earth’s crust.
a.) Both A and R are correct and explain each other clearly.
b.) Only R is correct
c.) Both are correct but do not explain each other.
d.) Only A is correct.
Answer: Both are correct but do not explain each other.
- Assertion (A): Lava is actually a fiery red molten magma coming out from the Earth’s crust and when cooled down becomes solid rock.
- Reason (R) : Extrusive Igneous rocks already get cooled down deep inside the Earth’s crust.
a.) Both A and R are correct and explain each other.
b.) Only A is correct
c.) Both A and R are correct
d.) R explain A clearly
Answer: Only A is correct
- Assertion (A): Extrusive Igneous rocks have a very fine grained structure .
- Reason (R) : Deccan Plateau is made up of Extrusive Igneous rock.
a.) Only R is correct
b.) R explain A clearly
c.) A is incorrect
d.) Both are incorrect
Answer: R explains A clearly
- Assertion (A): Intrusive Igneous rocks are those rocks which cool down deep inside the Earth.
- Reason (R) : Intrusive Igneous rocks cool when they come out from the Earth’s crust.
a.) Only R is correct
b.) Both are correct and R explain A clearly
c.) Only A is correct
d.) Both are incorrect’
Answer: Only A is correct
- Assertion (A): Hard rocks are used for making roads, houses and buildings. They are very useful.
- Reason (R) : Rocks used for building houses and roads can be used by the children for playing games.
a.) Only A is correct
b.) Both are correct and R explains A clearly
c.) Both are incorrect
d.) Only R is correct.
Answer: Only A is correct
- Assertion (A): Rocks roll down, crack and hit each other to become smaller particles called sediments.
- Reason (R) : Sediments are compressed and hardened to form layers of rocks which are called sedimentary rocks.
a.) Only R is correct
b.) Both are correct and R is the correct explanation of A
c.) Only A is correct
d.) Both the statements are incorrect
Answer: Both are correct and R is the correct explanation of A.
- Assertion (A): A rock transforming into another rock due to certain heat and pressure is called a rock cycle.
- Reason (R) : A sedimentary rock under heat and pressure changes to metamorphic rock.
a.) Only R is correct
b.) Both A and R are correct and R is the explanation of A
c.) Both are incorrect
d.) Only A is correct.
Answer: Both A and R are correct and R is the explanation of A.
- Assertion (A): Sedimentary rocks contain fossils.
- Reason (R) : Sandstone is a kind of sedimentary rock because it contains grains of sand.
a.) Both are correct but R is not the explanation of A.
b.) Only A is correct
c.) Both are incorrect
d.) R is the explanation of A
Answer: Both are correct but R is not the explanation of A
- Assertion (A): Sedimentary rocks are indirectly made of magma or molten rocks.
- Reason (R) : All rocks follow a cycle where they are transformed from one form to another.
a.) Both are correct and R is the explanation of A
b.) Only R is correct.
c.) Both are incorrect
d.) R is not the explanation of A
Answer: Both are correct and R is the explanation of A.
- Assertion (A): Minerals are naturally occurring substances which have certain physical and chemical composition and are very important to human kind.
- Reason (R) : As minerals are naturally occurring we cannot trust them for the use of humankind.
a.) Only A is correct
b.) Both are correct and R is the explanation of A
c.) Only R is correct
d.) Both are incorrect.
Answer: Only A is correct.
- Assertion (A): Red Fort is made of red sandstone.
- Reason (R) : Sedimentary rocks also contain fossil fuels. For eg; sandstone which is made of grains of sand also contain fossils of plants and animals.
a.) Both are correct but R is not the explanation of A
b.) Only R is correct
c.) R is the explanation of A
d.) Both are incorrect.
Answer: Both are correct but R is not the explanation of A.
Also See: Environment Chapter Assertion and Reason Questions