Across
- 2. an aggressive young man that is usually a trouble maker
- 4. a force that sends objects forwards
- 7. a deep undersea valley where crust sinks torwads the mantle
- 8. an undersea chian of mountains that is part of a long system of underwater mountains
- 9. apartments housing that is overcrowded and not taken care of
Down
- 1. the prices which crust sinks back into the mantle at a folding plate boundary
- 3. the proces by which molten material adds new crust under earths bodies of water
- 5. an origanol version for blueprint
- 6. the way a person behaves
- 10. a device that reflects sound waves of underwater objects and records the echo