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ICSE Class 9 Geography Question 1 of 18

Rocks — Question 8

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Question

Question 8

Assertion (A): Igneous rocks are called primary rocks.

Reason (R): They were the first to be formed.

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R does not explain A.
  3. A is true but R is false.
  4. A is false but R is true.
Answer

Both A and R are true and R is the correct explanation of A.

Explanation — Since the igneous rocks were the first to be formed, they are called primary rocks. They form the basis of formation of other types of rocks.