Across
- 5. a tectonic plate boundary where two plates collide.
- 7. an underwater mountain range formed by plate tectonics.
- 9. fossil magnetism is when magnetism of the Earth is weak but permanent.
- 11. a narrow zone of deep earthquake foci at a subduction zone.
- 13. the slow, circular movement of magma in the Earth's mantle.
Down
- 1. the name given to the area where one plate moves underneath another plate.
- 2. a type of fold in rock layers that forms a valley.
- 3. occurs when two tectonic plates move away from each other.
- 4. the mountain building process.
- 6. formed where two tectonic plates rub pass one another.
- 8. form at subduction zones, they are long, narrow depressions in the ocean floor.
- 10. a type of fold in rock layers that forms a ridge.
- 12. chains of volcanic islands on the continental side of an ocean trench.