science
Across
- 3. a supply of energy that can be used to make electric power
- 5. where trees live
- 7. when more than one species relies on the same limited resources
- 9. a self-contained living thing
- 10. all living matter on earth
- 12. a group of interacting species
- 14. not replaceable by natural means
- 15. replaced by natural means
- 16. living thing that affects an ecosystem
- 17. collects underground soil and cracks
- 18. weathering erosion or plate tectonics
Down
- 1. an animal that eats primary consumers
- 2. gets energy by feeding on producers
- 4. nonliving thing that affects an ecosystem
- 6. supply that benefits organisms
- 8. something that is in needed by organisms thats not in abundance
- 11. layer of gas surrounding a planet
- 13. resources that exist without human intervention