| A | B |
|---|
| system | group of parts that work together as a unit |
| stability | over time the changes in a system cancel each other out |
| ecosystem | groups of living things and the environment they live in |
| population | a group of the same species living in the same place at the same time |
| community | all the populations that live in the same area |
| habitat | an environment that meets the needs of an organism |
| niche | the role of an organism |
| producers | a living thing that makes its own food |
| consumers | a living thing that eat other living thngs for energy |
| decomposers | a living thing that feeds on the wastes of lants and animals or on their remains after they die |
| energy pyramid | a diagram that shows how much food energy is passed from one organism to another along a food chain |
| food web | a diagram that sows how food chains connect and overlap |
| climate | the average temperature and rainfall of an area over may years |
| diversity | variety |
| salinity | the amount of salt in the water |
| intertidal zone | a narrow strip along the shore, that is covered with water during high tide and exposed during low tide |
| near-shore zone | ocean zone that starts at the low-tide mark and goes out into the ocean |
| open-ocean zone | the deep parts of the oceans, located far from the shore |
