Across
- 1. A device that reflects sound waves off underwater objects and records echoes
- 2. A tool used to spread water across feilds
- 4. A deep undersea valley where crust sinks toward the mantle
- 7. An undersea chain of mountains that is a big part of a system of underwater of underwater mountains.
- 8. a type of fabric woven from fax plants
- 9. A waterfall
Down
- 1. the process by which molten material adds new crust below earths bodies of water
- 3. good for growing crops
- 5. the process by which crust sinks back into the mantle at a colliding plate boundary
- 6. The area near a river mouth where the water deposits fine soil