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| Term | Definition |
|---|---|
| air mass | a body of air that has the same temperature and/or humidity throughout |
| air pressure | the pressure exerted by air per unit surface area in the earth's atmosphere. Also called barometric pressure |
| almanac | a publication that contains astronomical and meteorological data and forecasts |
| aneroid barometer | a barometer that does not require the use of a liquid |
| atmosphere | the layer of air that surrounds the earth |
| barometer | a device used to measure air pressure |
| Beaufort scale | a scale that relates the wind speed to its effects both on land and at sea, classified from force 0 to force 12 |
| cirrus | high level clouds made mostly of ice crystals |
| climate | the average weather over a long period of time |
| cloud layer | the lowest 10-12 kilometers (6-7 miles) of the atmosphere; where clouds form |
| coding | a system of using symbols to convey information |
| cold front | the leading edge of a moving mass of cold air |
| condense | to change from a gas to a liquid |
| convection | the phenomenon of warm air rising and cold air sinking and taking its place |
| cumulonimbus | clouds that bring summer storms, usually thunder, lightning, and strong winds |
| cumulus | mid-level, puffy clouds |
| fog | clouds that form at ground level |
| folklore | the traditional beliefs and legends of a people that are passed down through generations |
| forecast | a prediction of the weather and conditions for a given area and a given time period |
| front | the boundary between two unlike air masses |
| hurricane | a large rotating windstorm with a clam central eye and winds greater than 118 kmp |
| isobar | lines drawn on a weather map that connect areas of the same barometric pressure at a given time |
| isotherm | lines drawn on a weather map that connect areas of the same temperature at a given time |
| meteorologoist | a person who studies meteorology |
| meteorology | the study of the earth's atmosphere and what happens in it |
| millibar | a metric unit of barometric pressure; 34 millibars equals 1 inch of mercury |
| nimbostratus | clouds with heavier appearance that produce more substantial precipitation |
| nimbus | a cloud that yields rain or snow |
| nuclei | tiny particles in the atmosphere, around which water vapor condenses |
| occluded front | where a cold front catches up to and overtakes a warm front |
| precipitation | any liquid or solid form of water that falls from the atmosphere. For example, rain, snow, hail, or sleet |
| rain gauge | a device used to measure the amount of precipitation in a given area |
| station model | a weather symbol that represents the state of the weather at a particular place |
| stationary front | when a cold and a warm air mass meet, but neither moves |
| stratus | lower-level, layered-looking clouds |
| tornado | a narrow, violently rotating column of air characterized by winds greater than 81 kph and a funnel cloud that reaches the ground |
| vacuum | an area of no air pressure |
| warm front | the leading edge of a moving mass of warm air |
| weather | the state of the atmosphere at a given time and place with respect to wind, temperature, cloudiness, moisture, pressure, and other factors |
| weather forecasting | predicting what future weather will be like |
| weather front | the boundary where different air masses collide |
| weather station | a place where weather data are recorded |
Created by:
ctalley
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