| A | B |
| water cycle | ongoing movement of water into the air and back to Earth's surface |
| evaporation | change from liquid to gas |
| transpiration | plant release moisture through its leaves |
| condensation | change from a gas to a liquid |
| precipitation | any form of water that falls from teh atmosphere to Earth's surface |
| reservior | place where water is collected and stored |
| aqueduct | system of channels, pipes, tunnels, and pumps that carries water from distant sources |
| air | nitrogen, oxygen, carbon dioxide, and water vapor |
| atmosphere | blanket of air the surronds the Earth |
| toposhere | lowest layer of the atmosphere and the only place that contains life |
| weather | condition of the atmosphere at a certain place and time |
| wind | uneven heating of Earth's surface |
| land breeze | cool land, warm sea |
| sea breeze | warm land, cool sea |
| air pressure | the push of air against it's surroundings |
| wind vane, windsock | shows direction of wind |
| anemometer | measures wind speed |
| cloud | formed by water vapor in the air condenses |
| fog | a cloud that touches Earth's surface |
| cumulus clouds | puffy white clouds, looks like cotton balls |
| stratus clouds | flat gray clouds |
| cirrus clouds | wisps of high in the sky |
| air mass | a body of air that has the same general tempature and air pressure |
| front | a place where two different types of air masses meet |
| cold front | cold mass moves into a warm air mass, produce heavy rain and thundrstorms |
| warm front | warm air mass moves into a cold air mass, bringing light rain |
| thunderstorm | tall clouds, heavy rain, strong winds, lightning, and thunder |
| flash floods | heavy rain or hail |
| hurricans | large violent storms that form over the warm ocean water |
| tornado | funnel-shape cloud of spinning wind |