| A | B |
|---|
| evaporation | the change of state from liquid to vapor |
| ground water | water stored in underground caverns or porous rock |
| decomposition | the breakdown of dead materials into carbon dioxide and water |
| combustion | the process of burning; includes the burning of fossil fuels |
| succession | the gradual regrowth or development of a community of organisms over time |
| pioneer species | the first organisms to grow in an area undergoing ecological succession |
| carbon cycle | the movement of carbon from the environment into living things and back into the environment |
| water cycle | the movement of water among the oceans, atmosphere, land, and living things |
| photosynthesis | the process by which carbon cycles from the environmet into living things; plants use carbon dioxide from the air to make sugars |
| respiration | sugar molecules are broken down to release energy; carbon dioxide and water are release as byproducts |
| nitrogen cycle | the movement of nitrogen from the environment to living things and back again |
| precipitation | water that moves from the atmosphere to the land and ocean, including rain, show, sleet, and hail |
