Download How can you model Earth movements?

The Earth and Atmosphere.
W12
Look at the diagram of the Earth.
1 a) Why do you think that the diagram gives you the average thickness of the crust?
b) Where do you think the crust will be thicker, under the seabed or where there is a mountain
range?
2 What is the radius of the Earth?
3 What is the diameter of the Earth?
4 Fill in the missing spaces in the sentences here with the words crust, mantle or core.
a) The .......................... is made mainly of iron and nickel.
b) The densest part of the Earth is the ..........................
c) The crust lies on top of the ..........................
d) The ..........................is the least dense layer of the Earth.
e) The ..........................is at the centre of the Earth.
f) The ..........................is the layer between the crust and the core.
g) The inner part of the ..........................is a solid but the outer part is a viscous liquid.
h) The ..........................is a solid that can flow very slowly because it is very hot.
i) The ..........................is a thin later of solid rock.
5 The Earth’s crust is made up of two parts.
a) name the two parts.
b) Both are mainly igneous rock. What is igneous rock?
c) Name the igneous rock in each part of the crust.
6 Name the two other rock groups, apart from igneous.
7 The rocks in the crust are less dense than the material inside the Earth. How did this happen?
KS4/Mod06/Earth Materials.P.J.McCormack.24/10/02