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