Question

Ill. Answer the following questions.

1 . Why are metamorphic rocks often banded or layered?

2. Why do metamorphic rocks belong to the secondary group of rocks?

3. What are rocks?

4. Write a note describing the barysphere.

5. Differentiate between extrusive and intrusive rocks.

6. Explain the concept behind the rock cycle. Diagram

7. What are the uses of rocks and minerals?

7. Why is the core also called nife?

8. Why are the igneous rocks also known as primary rocks?

9. Name the three layers of the Earth and write one line on each layer.

10. Name the three groups of rocks and write one line about each of them.

11. How are igneous rocks formed?

12. What are sedimentary rocks? How are they formed?
13. Why are intrusive igneous rocks usually coarse grained.

14. Enumerate the differences between the sial and the sima layers in the crust.​

Answer 1

Explanation:

3)A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid mater

7)Rocks and minerals are all around us! They help us to develop new technologies and are used in our everyday lives.

8)Igneous rocks are created from the cooling of molten magma/lava. All other rocks are derived from them. Because they form the basis of formation of other types of rocks, igneous rocks are known as the primary rocks.