Ecosystem

3. a group of organisms of one species that live in an area at the same time
5. any substance that damages an environment
7. an animal that hunts and eats another animal
8. an attempt to preserve or protect an environment from harmful changes
10. a place that provides all the things an organism needs to live
11. organisms that cannot make their own food
13. organisms that get their energy by breaking down wastes and dead organisms
14. any animal that is hunted by others for food

1. a diagram that combines many food chains into one picture
2. all the conditions surrounding an organism
4. a series of steps by which energy moves from one type of living thing to another
6. the struggle of organisms for the same limited resource
9. make their own food for energy
12. different populations in one area
15. all living and nonliving things in an area and their interactions