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