Moving Earth

4. when two continents crumple together to form a mountain range
7. range a group of high ground features, commonly the result of tectonic collision
8. plate boundary where crust is neither created or destroyed
9. fault a break where the rock above the fault moves ‘up' due to compression
10. plate boundary where new crust is formed
12. extremely hot liquid or semi-liquid rock within the mantle. When it erupts on the surface of the Earth it is called lava.
13. a break in the crust where one side moves relative to the other
14. core solid inner-most layer of the core under extreme pressure conditions, with an approximate 1200 km radius
15. a stretching force
16. a convergent plate boundary where one plate moves under another
18. fault a break where the rock above the fault moves ‘down' due to tension
19. a smearing force

1. boundary where two tectonic plates move towards each other
2. tectonics a scientific theory that describes the relative movements and interaction of plates of the Earth's crust over the underlying mantle
3. a highland between two normal faults
4. drift movement of the Earth's continents relative to each other over geologic time
5. fault a break where the rocks on either side of the fault move horizontally due to shearing
6. core liquid outer layer of the core, about 2300 km thick
8. hot centre of the Earth made of iron and nickel
9. valleys a sunken lowland between two normal faults; a graben
10. squeezing force
11. boundary where two tectonic plates slide past one another
12. solid but soft middle rock layer of the Earth
17. a supercontinent that existed about 225 million years ago. All landmasses were joined together to form this supercontinent.