Across
- 1. a dry area with very little rainfall
- 5. an opening in Earth's surface with lava
- 7. the variety of living things in an area
- 9. a raised area of land lower than a mountain
- 10. harmful substances added to the environment
- 11. land completely surrounded by water
- 12. cutting down large areas of trees
- 13. a large, slow-moving mass of ice
- 17. growth of cities and towns
- 19. the natural world around us
- 20. protecting or preserving the environment
- 21. a flowing body of water
- 23. a low area of land between hills or mountains
- 24. a very high area of land with steep sides
Down
- 2. community of living things in environment
- 3. the process of land being worn away by nature
- 4. the natural home of a plant or animal
- 6. land surrounded by water on three sides
- 8. flat area of land that is higher up
- 14. long-term weather patterns in an area
- 15. a large area of flat land
- 16. breaking down of rocks into small pieces
- 18. resource materials from Earth that humans use
- 22. natural shape or feature of Earth's surface