Across
- 4. Variety of life in a particular ecosystem
- 5. A major regional community of plants and animals
- 7. Long-term maintenance of environmental balance
- 9. Contamination of air, water, or land
- 10. Gas essential for respiration
- 11. Breaking down organic waste into nutrient-rich soil
- 13. heat in the atmosphere
- 14. sources bodies of water that supply water for public and private use
- 15. Land where water covers the soil
- 18. method of waste disposal
- 20. The process by which plants make food
Down
- 1. A natural unit of living and nonliving components Climate– The condition of the atmosphere over time
- 2. Chemical element present in all living things
- 3. Protecting natural resources from destruction
- 6. Source of fresh underground water
- 8. The layer of gases surrounding Eart
- 12. water water that collects on the ground
- 16. Trees being cut down on a large scale
- 17. Where an organism lives
- 19. The slow wearing away of soil or rock