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weather and cilmate
unit 10
| Question | Answer |
|---|---|
| water cycle | the continuous movement of water between the atmosphere, the land , the oceans , and living things |
| evaporation | the change of state from a liquid to gas. |
| transpiration | the process by which plants release water vapor into the air through stomata; also the release of the water vapor into the air by other organisms. |
| sublimation | the process in which a solid changes directly into a gas. |
| condesnation | the change of state from a gas to a liquid. |
| preeipitation | any form of water that falls to earth 's surface from the clouds; includes rain, snow, sleet , and hail. |
| weather | the short -term state of the atmosphere , including temperature , humidity precipitation , wind and visibility. |
| humidity | the amount of water vapor in the air. |
| relative humidity | the ratio of the amount of water vapor in the air to the amount of water vapor needed to reach saturation at a given temperature. |
| dew point | at constant pressure and water vapor content , the temperature at which the rate of condensation equals the rate of evaporation. |
| air pressure | the measure of the force with which air molecules push on a surface. |
| wind | the movement of air caused by differences in air pressure. |
| visibility | the distance at which a given standard object can be seen and identified with the unaided eye |
| air mass | a large body of air throughout which temperature and moisture content are similar. |
| front | the boundary between air masses or different densities and usually different temperatures. |
| jet stream | a norrow band of strong winds that blow in the upper troposphere. |
| thunderstrom | a usually brief, heavy Storm that consists of rain , strong winds , lighting , and thunder. |
| lighting | an electric discharge that takes place between two oppositely charged surfaces, such as between a cloud and the ground, between two clouds, or between two parts of the same cloud. |
| thund | the sound caused by the rapid expandtion of air along an electrical strike . |
| hurricane | a severe Storm that develops over tropical oceans and whose strong winds of more than 119 km/h spiral in toward the intensely |