Across
- 2. Includes all parts of Earth in which life exists
- 6. Consists of short-term changes in temperature, precipitation, clouds, and wind
- 10. Any living part of the environment
- 11. Organisms that produce their own energy
- 13. Material formed from decaying leaves and other organic matter
- 14. The place an organism lives
- 16. A layer of permanently frozen subsoil
- 17. Scientific study of human populations
- 19. Patterns in temperatures, precipitation, clouds, and wind over many years
- 20. Floating algae
Down
- 1. Layer of shorter trees and vines
- 3. A group of individuals that belong to the same species and live in the same area
- 4. Elements that an organism needs to sustain life
- 5. A group of similar organisms that can breed and produce fertile offspring
- 7. Total amount of living tissue within a giver trophic level
- 8. Includes all gases that surround Earth
- 9. Wetland formed when a river meets the sea
- 12. Dense, leafy covering
- 15. Get energy from eating other organisms
- 18. Any non-living part of the environment