Question

(
million years ago.
Fill in the blanks.
waves tells us about the earth's interior.
1. Earth was formed about the _ million years ago .
2. The behaviour of _
of dust varies from place to place.
3. The _ of crust varies from place to place .
4. Rocks are classified into three groups on the basis of their_
5. The _ of the earth is rich in iron and nickel.

Answer 1

Answer:

1. Earth was formed about the 4.5 billion years ago .

2. The behaviour of gases with many differents

of dust varies from place to place.

3. The earth's of crust varies from place to place .

4. Rocks are classified into three groups on the basis of their igneous rocks, metamorphic rocks and sedimentary rocks.

5. The layers of the earth is rich in iron and nickel.