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TermDefinition
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