| A | B |
|---|
| evaporation | change in a substance from a liquid to a gas |
| condensation | change in state of a substance from a gas to a liquid |
| precipitation | any form of water that falls to the earth's surface from clouds |
| runoff | water that flows into streams, rivers, lakes, and oceans |
| groundwater | water that has seeped back into the ground and stored between rocks and in spaces underground |
| transpiration | when plants release water vapor |
| organic molecules | molecules that contain carbon |
| photosynthesis | the basis of the carbon cycle |
| photosynthesis | plants use carbon dioixde to make sugar |
| respiration | plants use sugar and oygen to release energy |
| decomposition | the breakdown of substances |
| combustion | the burning of a substance that releases CO2 into the air |
| nitrogen fixation | bacteria change nitrogen gas into a substance that plants can use |
| succession | gradual development of a community over time |
| primary succession | starts with bare rock |
| pioneer species | the first species to move into an area |
| secondary succession | a community grows where a previous community was destroyed |
| biodiversity | the variety of species present in an area |
| climax species | a well adapted, slow growing species |
