Moving Earth
Across
- 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
Down
- 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.