Across
- 5. a series of organisms showing who eats whom
- 6. day-to-day conditions of the atmosphere
- 7. many connected food chains in an ecosystem
- 12. the variety of life in an area
- 13. the movement of soil or rock by wind or water
- 14. a resource that can be replaced naturally
- 15. the process plants use to make food
- 17. the area of land that drains into a body of water
- 20. water that flows over land into streams and lakes
- 21. energy resources formed from ancient organisms
- 22. long-term weather patterns in an area
- 26. a resource that cannot be replaced quickly
- 27. a group of the same species living in one place
Down
- 1. all the different populations living together
- 2. a species that spreads and harms ecosystems
- 3. a place where waste is buried
- 4. an organism that makes its own food
- 8. a community of living things interacting with their environment
- 9. using less energy to do the same work
- 10. harmful substances added to the environment
- 11. removing trees from an area
- 16. using resources in a way that lasts
- 18. taking too many fish from a body of water
- 19. effect warming caused by gases trapping heat
- 20. turning waste into new materials
- 22. an organism that eats other organisms
- 23. an organism that breaks down dead material
- 24. the place where an organism lives
- 25. protecting natural resources