Ecosystems

2. A non-native organism that causes harm to an ecosystem.
3. An animal in a predatory-prey relationship that captures and eats other animals.
7. Any organism that or makes its own food
10. The animal that is captured and eaten in a predatory-prey relationship.
11. An event that changes an ecosystem for a long period of time. A disturbance can be caused by humans or by natural processes.
13. A model showing the path of energy through a series of organisms in an ecosystem.
14. Dioxide a gas found in the air that is used to make food by photosynthesis
15. A mixture of soil and decaying matter that provides the materials that plants need.
17. All the living and nonliving things that interact with each other in an area
18. a gas found in air that is produced as waste during photosynthesis.
19. The process of moving blood in a large, complicated loop through the body.

1. An organism that breaks down dead organisms and wastes to live and grow
4. A model that shows the amount of energy that is passed on at each level of a food chain.
5. One group of organisms that are too small to be seen without a microscope.
6. A group of organisms that are not plants or animals and that act as decomposers. Molds are fungi.
8. The process that breaks down food into simple materials that an animal's body can use
9. The slow changes that take place in an ecosystem that has been disturbed. One group of organisms replaces another group until a stable community is formed.
12. An organism that gets energy by eating other organisms
13. A diagram that shows the many connected food chains and feeding relationships in an ecosystem.
16. The process that producers use to make food from carbon dioxide and water