1. Circular currents of heat in the Mantle
Crust
The outer layer of the Earth
Relatively thin – up to 70km thick
Oceanic or Continental
Split into plates
Likely to move at Plate Boundaries
Mantle
Layer beneath the crust
Dense, semi molten state – silicate rocks
Plates float on the mantle
Up to 5000°c, which creates powerful convection currents
Convection Currents
Circular currents of heat in the Mantle
Caused by the rising heat within the mantle
Direction of currents drives, and determines direction of plate movements
Core
Divided into 2 sections – inner and outer
Up to 6200°c
Extreme pressure
Iron and nickel
Outer core semi molten
Inner core dense and solid

3. Most likely to be…which part of Earth structure:
1. Find yourself being carried round and round, very slowly
2. Under the most intense pressure
3. Surrounded by either basalt or granite
4. In a half solid/half liquid state
5. In the thinnest section
6. Always moving
7. Feel trapped underneath a very hard roof