Across
- 4. two organisms using the same resources
- 7. layers of an energy pyramid
- 8. two organisms that eat one another
- 10. which energy flows
Down
- 1. a process plants go through
- 2. possible food chains in an ecosystem
- 3. passing of matter and energy
- 5. a cycle that uses air we breathe
- 6. water leaves the earth; enters atmosphere and turns into a gas
- 9. two organisms living together and interacting with one another