Across
- 4. When hot, less dense material rises from the Earth's crust,it causes _____ spreading
- 6. Two plates moving away from each other
- 8. Two Plates moving towards each other
- 9. Harry Hess mapped the ocean floor using ____
- 10. Continental-Continental plate movement makes ____ ranges
Down
- 1. A oceanic plate sliding under another plate
- 2. Made the first continental drift theory
- 3. A mountain in the ocean is called a Mid Ocean ___
- 5. The name of a supercontinent
- 7. A ____ boundary is when two plates slide past each other