Across
- 3. spreading The process by which molten material adds a new crust below earth's bodies of water
- 6. a force that sends a object forward
- 7. an aggressive young man that is usually a trouble maker
- 8. apartment housing that is overcrowded and not well taken care of
- 10. the way a person behaves
Down
- 1. ridge a undersea chain of mountains that is a part of a long system of underwater mountains
- 2. a device that reflects sound waves off underwater objects and records the echoes
- 4. an original version or blueprint
- 5. The process by which the crust sinks back to the mantle at a colliding plate boundary
- 9. a deep undersea valley where crust sinks towards the mantle