Across
- 2. A person who specializes in writing and serves as a record keeper
- 4. A picture of drawing that represents a word idea
- 6. A sharpened reed used to press markings into clay labels
- 8. A mixture of copper and tin; used to make stronger tools
- 9. A deep undersea valley where the crust sinks towards the mantle
- 10. An undersea chain of mountains that is a part of a long system of underwater mountains
Down
- 1. The process by which molten material adds new crust below earth's bodies of water
- 3. A device that reflects sound waves off underwater objects and records the echoes
- 5. The process by which crust sinks back into the mantle at a colliding plate boundary
- 7. A type of writing made up of wedge-shaped markings