Ecosystems

3. Obtains energy by feeding on other organisms
5. Consists of many overlapping food chains in an ecosystem
6. A series of events in which one organism eats another and obtains energy and nutrients
11. An environmental factor that causes a population to stop growing or to decrease in size
12. The source of food for other organisms in an ecosystem
13. The nonliving parts of an organism's habitat
14. All the different populations that live together in an area
16. The amount of energy that moves from one feeding level to another in a food web

1. The parts of a habitat that are or were once alive that interact with an organism
2. An environment that provides the things a specific organism needs to live, grow, and reproduce
4. The community of organisms that lives in a particular area, along with the nonliving environment
7. study of how organisms interact with each other and their environment
8. Break down biotic wastes and dead organisms, returning raw materials to the ecosystem
9. All members of one species living in a particular area
10. The number of individuals in an area of a specific size
15. A living thing