| A | B |
|---|
| condensation | the change of state from a gas to a liquid |
| photosynthesis | the process by which some organisms use sunlight, carbon dioxide, and water to make food |
| combustion | the burning of a substance |
| evaporation | the change of a substance from a liquid to a gas |
| succession | the replacement of one type of community by another at a single location over a period of time |
| decomposition | the breakdown of substances into simpler molecular substances |
| predator | an organism that kills and eats all or part of another organism |
| prey | an organism that is killed and eaten by another organism |
| carbon cycle | the exchange of carbon between the environment and living things |
| water cycle | the movement of water between the oceans, atmosphere, land and living things |
| nitrogen cycle | the movement of nitrogen between the environment and living things |
| respiration | the exchange of oxygen and carbon dioxide between living cells and their environment |
| pioneer species | a species that colonizes an uninhabited area and that starts the process of succession |
| organic | compounds containing carbon |
| primary succession | succession that occurs in an area where other organisms have not previously lived |
| secondary succession | succession that occurs in an area where an existing ecosystem was destroyed |
| groundwater | precipitation that is stored in spaces between or within rocks |
| transpiration | the process by which plants release water vapor into the air |
| biodiversity | the number and variety of organisms in a given area during a specific period of time |
| runoff | precipitation that falls on land and flows into streams, rivers, and lakes |
| precipitation | any form of water that falls to the Earth's surface from the clouds |
