Across
- 4. the act of saving, protecting, or using resources wisely
- 7. something that people use from nature
- 13. the dropping off of eroded soil and bits of rock
- 14. the movement of weathered material from one place to another.
- 15. a layer of rock that is permeable to water
- 17. does not allow liquid or gas to pass through it
- 18. how you get rid of something
- 20. the particles of soil or rock that have been eroded and deposited
- 21. a black or brown rock that is found in the earth and burned as fuel
Down
- 1. a mixture of gases found below Earth's surface that is used as fuel
- 2. to have many small spaces or holes
- 3. the process by which soil is worn away by wind and rain
- 5. to put through a process that allows things to be reused
- 6. cannot be replaced by nature easily or quickly
- 8. a large sheet of ice that moves slowly across the land
- 9. a type of weathering that occurs when water soaks into a material, freezes, expands, and causes the material to split or break apart
- 10. can be replaced by nature easily or quickly
- 11. all the living and nonliving things in an area
- 12. a liquid that is found beneath Earth's surface that is used to form fuels and to make a variety of other products
- 16. slow process that breaks rocks and other Earth materials into smaller pieces
- 19. allows liquid or gas to pass through it