The Earth's internal structure

Question 1

Crust

Answer 1

Solid
22*c
Oceanic: Made up of iron, oxygen, silicon, magnesium and aluminium. Thin and dense. 6-10km thick. Brittle so will break when put under stress.
Continental: Older, thicker, less dense, 54-50km thick, Brittle so will break when put under stress.

Question 2

Upper Mantle

Answer 2

liquid (molten)/solid
1400-3000*c
Lithosphere: Made up of iron, oxygen, silicon, magnesium and aluminium. Uppermost part of the upper mantle, Solid as it is cooler, brittle so will break under stress.
Asthenosphere: Made up of iron, oxygen, silicon, magnesium and aluminium. Lower part of the upper mantle. Solid but so hot that it flows.

Question 3

Lower Mantle

Answer 3

Solid
3000*c
Made up of iron, oxygen, silicon, magnesium and aluminium. It is hot enough to melt but solid due to the pressure put on it.

Question 4

Outer Core

Answer 4

Mostly Liquid
4000-6000*c
Made up of Iron, Nickel, sulphur and oxygen.
The movement of the metals in this layer creates our planet’s magnetic field.

Question 5

Inner Core

Answer 5

Solid
5000-6000*c
Made up of Iron and Nickel
A huge metal ball 2500km wide.
Stays solid due to incredible pressure surrounding it.