| A | B |
|---|
| nitrogen cycle. | The cycle in which nitrogen gas is changed into forms of nitrogen that plants can use. |
| carbon-oxigen cycle. | The process by which carbon and oxygen cycle among plants, animals, and the environment. |
| respiration. | The process that releases energy from food. |
| water cycle. | The cycle in which Earth's water moves through the environment. |
| evaporation. | The process by which a liquid changes into a gas. |
| condensation. | The process by which a gas changes into a liquid. |
| precipitation. | Any form of water that falls from clouds,such as rain or snow. |
| transpiration. | The process in which plants give off water through their stomata. |
| water cycle. | The cycle in which Earth's water moves through the environment. |
| solar energy. | The energy of sunlight. |
