Ecosystems Revision

2. Required for photosynthesis to occur
4. Place where a population of organisms live
8. Hunts prey for food and energy
10. An example of a decomposer that belongs to the fungi kingdom
11. Organisms that break down dead matter and return nutrients to the ecosystem
14. Food webs are comprised of many food _________
16. Cutting down of tress that has a negative impact on the habitats of organisms is known as _____________
18. Relationship where one organism lives in or on the body of another. One benefits and the other is harmed.
19. Where organisms live together and both benefit from the relationship
20. Living factors in an ecosystem

1. An energy __________ shows how the amount of energy available at the top is less than at the bottom
3. Reaction that introduces chemical energy into an ecosystem
5. Non-living factors in an ecosystem
6. A term that describes the living world
7. Relationship where one organism benefits and the other organism is not affected
8. A group of living organisms that are the same species, living in the same place at the same time
9. Flows through a ecological pyramid
12. Ultimate source of energy for producers comes from the ______
13. A close physical and long-term relationship between two organisms of different species
15. All the organisms in an ecosystem
17. Product of photosynthesis that is not oxygen