Question

IV. Answer the following questions in brief.
1. Name the three layers of the Earth and write one line on each layer.
2. What are rocks?
3. Name the three groups of rocks and write one line about each of them.
4. How are igneous rocks formed?
5. What are sedimentary rocks? How are they formed? ​

Answer 1

1. The core, the mantle, the crust

core:

the core of the earth is made up of mainly of iron in an outer liquid layer and an inner solid layer

mantle:

the mantle is the mostly solid bulk of earths interior

crust:

crust describes the outermost shell of a terrestrial planet

2.any natural mass of mineral matter that makes up the earths crust is called a rock

3. the three rocks are igneous rocks , sedimentaryrocks, metamorphic rocks

4. igneous rocks form when hot molten rock crystallizes and solidfies

5.when the big rocks breaks into small rocks then sedimentary rocks form