Across
- 6. An organism that eats both plants and animals.
- 9. The maximum number of organisms an environment can support.
- 12. A model that shows many connected food chains.
- 13. Nonliving parts of an ecosystem such as water, sunlight, and soil.
- 15. Organisms that break down dead matter and recycle nutrients.
- 17. A feeding level in a food chain where energy decreases at each step.
- 19. The continuous movement of water through an ecosystem.
Down
- 1. A factor such as food, water, or space that limits population growth.
- 2. The movement of carbon through living and nonliving systems.
- 3. A group of the same species living in the same area.
- 4. Things like food, water, and shelter that organisms need to survive.
- 5. Living parts of an ecosystem.
- 7. An organism that makes its own food using sunlight.
- 8. All the living and nonliving things interacting in an area.
- 10. The movement of energy through a series of organisms.
- 11. What happens to matter in an ecosystem as it moves through cycles.
- 14. What may happen to a population when resources become limited.
- 16. The original source of energy for most ecosystems.
- 18. The process by which plants use sunlight to make food.