Across
- 2. A study of the physical features of the earth.
- 5. An area of high, flat ground.
- 6. A mountain that can erupt.
- 10. The rising and falling of the sea.
- 11. Hot liquid within the earth's crust.
Down
- 1. A large steep hill.
- 3. A line of mountains.
- 4. The movement of water.
- 7. A small river.
- 8. A large area of water.
- 9. The pointed top of a mountain.