ROCKS

Question 1

Can you name and explain the earths layers?

Answer 1

1) crust- We live on the crust, a thin layer of solid rock.
2) mantle- Is mostly solid but deep down it can flow slowly. The temperature increases the more deeper you go into the mantle.
3) Core- Is in the centre of the earth and we think it is made of iron and nickel.

Question 2

what are tectonic plates?

Answer 2

The crust and the upper part of the mantle are cracked into a number of large pieces called tectonic plates. They move really slow, but if then move suddenly then they cause earthquakes and make volcanos.

Question 3

What are the three types of rocks?

Answer 3

1) igneous rocks- are formed when magma cools down. there are two types: intrusive and extrusive.

2) sedimentary rocks- formed from layers of sediment (rock fragments or dead matter) laid down in lakes or seas and get cemented together by other minerals.

3) Metamorphic rocks- are formed underground by heat and pressure.

Question 4

what is weathering and what are the three types?

Answer 4

Weathering is the breaking down of rocks, the three types are called:
1) chemical weathering
2)biological weathering
3) physical weathering

Question 5

What is erosion?

Answer 5

The wearing down of rocks