Across
- 2. A specialized writer who keeps records.
- 3. A mixture that consists of copper and tin used for stronger tools and weapons.
- 4. A picture or drawing used to symbolise words or an idea.
- 5. A sharpened reed used to press markings on clay tablets.
- 8. A chain of mountains that is undersea and is apart of a system of more underwater mountains.
- 9. A type of writing that is formed by wedge shaped markings.
Down
- 1. A deep sea valley where the crust sinks into the mantle.
- 2. When molten comes in between a mid-ocean ridge and causes it to expand.
- 6. When the crust sinks into the mantle and crashes into a plate boundary.
- 7. A device that reflects the sound from waves on underwater objects and echos.