Across
- 1. fuels formed from the remains of dead animals and plants deposited in a previous geologic time.
- 7. inorganic substances on or in the earth.
- 10. the mixture of gases that make up the atmosphere.
- 12. all plants and animals that are living in the wild
- 13. the movement of air.
- 14. resources that may be living or were living at one time.
- 16. a layer of gases that surrounds the earth.
- 17. the outer layer of earth's surface that supports life.
- 18. the control of plants and animals by humans
- 19. resources replaced naturally.
- 20. the movement of water from the earth's surface to the atmosphere and back.
Down
- 2. interactions between climate, lithosphere, hydrosphere, and biosphere.
- 3. resources that cannot be replaced after being used.
- 4. resources that come from non-living, non-organic materials.
- 5. all the water on earth whether liquid, solid, salty, or fresh.
- 6. the combination of soil and rock that makes up the earth's crust.
- 8. the source of almost all the energy used on earth.
- 9. a tasteless, colorless, liquid natural resource.
- 11. the average weather conditions in a region over a period of years.
- 15. all types of living things on earth.