Across
- 1. A closed ecosystem.
- 3. This is a nonliving factor in an environment.
- 5. An ecosystem is a community of these.
- 8. These are in a forest ecosystem.
- 11. Plants get their energy from here.
- 12. Organisms interact with this environment.
- 14. Organisms use energy to do this.
Down
- 2. Ecologists study these.
- 4. An ecosystem with fish, snails and plants.
- 6. Another word for matter is this.
- 7. Ecologists study how organisms and nonliving things do this.
- 9. Energy for most ecosystems comes from here.
- 10. Plants make this through photosynthesis.
- 13. This provides matter and energy.