| Term | Definition |
|---|
| producers | organisms such as plants that get their energy directly from the sun |
| 1st level consumers | animals that eat plants |
| 2nd level consumers | animals that eat other animals |
| apex predator | an animal at the top of the food chain in its ecosystem |
| decomposers | organisms that return the enrgy from dead organisms back into the soil |
| adaptation | a change that an organism makes to better survive in its environment |
| extinction | when all members of a species have disappeared |
| endangered | when most of the members of a species have disappeared and it is in danger of extiction |
| food web | shows how food chains in an ecosystem are connected |
| energy pyramid | shows how energy is passed in an ecosystem |
| food chain | shows a possible path along which energy can travel through an ecosystem |
| competition | the struggle among organisms to survive in a habitat with limited resources |
| prey | an organisms that is eaten by a predator |
| predator | an animal that feeds on other animals |
| symbiosis | a close relationship between organisms that benefits at least one of the organisms |
| host | the organism that a parasite eats from |
| parasite | an organism that gets its food by living off a host |
| nitrogen cycle | the process where nitrogen is returned to the air and soil after it has been used by plants and animals |
| carbon cycle | the process where carbon is exchanged between plants and animals |
| water cycle | the process where water travels between the atmosphere, organisms, and the earth |
| succession | a series of predictable changes over time |
Combine with other sets
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