Across
- 7. A population of animals that feed on animals below it in the food chain
- 9. An interconnected web of food chains with consumers and producers
- 11. the number of one single species in an area
- 13. The gas given off by animals breathing
- 18. the base of the food chain made up of plants
- 20. A population of organisms that is a source of food for another organism.
- 21. The gas given off by plants
- 22. all of the living matter in an ecosystem
Down
- 1. recycle nutrients from dead plants and animals back into the soil or water
- 2. what plants make from carbon dioxide and water
- 3. when two animals strive for the same resource
- 4. the organelle where photosynthesis takes place
- 5. When one animal hunts and kills another animal for food
- 6. all of the organisms live in an area
- 8. all of the non living matter in an ecosystem
- 10. an organism that eats other plants and animals for food
- 11. when one organism lives on or in another host organism causing the host harm
- 12. Process where plants use the suns energy to make glucose from carbon dioxide and water
- 14. on a food web, the flow of this is shown by an arrow
- 15. where an animal lives such as the desert
- 16. the organelle where celluar respiration takes place
- 17. A relationship where both species benefit
- 19. all the living and non living things in an area