Ecosystems Revision

4. Place where a population of organisms live
6. Required for photosynthesis to occur
11. Product of photosynthesis that is not oxygen
12. All the organisms in an ecosystem
14. An energy __________ shows how the amount of energy available at the top is less than at the bottom
15. Organisms that break down dead matter and return nutrients to the ecosystem
17. Relationship where one organism lives in or on the body of another. One benefits and the other is harmed.
18. A group of living organisms that are the same species, living in the same place at the same time
19. Reaction that introduces chemical energy into an ecosystem

1. Living factors in an ecosystem
2. Flows through a ecological pyramid
3. A close physical and long-term relationship between two organisms of different species
5. Non-living factors in an ecosystem
7. An example of a decomposer that belongs to the fungi kingdom
8. Ultimate source of energy for producers comes from the ______
9. Cutting down of tress that has a negative impact on the habitats of organisms is known as _____________
10. Where organisms live together and both benefit from the relationship
12. Relationship where one organism benefits and the other organism is not affected
13. Hunts prey for food and energy
16. Food webs are comprised of many food _________