Across
- 3. a deep pool at the base of a waterfall
- 7. natural formations on Earth’s surface
- 9. the natural features of a piece of ground
- 11. people who study the history of Earth
- 13. small sea invertebrates, such as coral
Down
- 1. relating to the production of offspring
- 2. the gaseous state of water
- 4. a large raised area of flat land
- 5. a long, narrow opening or crack
- 6. people who climb mountains
- 8. moving in the same direction
- 10. the natural removal of rock or soil by water
- 12. a group of people living in the Himalayas