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Weather
Chapter 12
28
Science
8th Grade
03/25/2014

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Cards

Term
evaporation
Definition
changing of a liquid to a gas
Term
transpiration
Definition
process by which plants give off water vapor into the air
Term
capacity
Definition
amount of material something can hold
Term
saturated
Definition
filled to capacity
Term
specific humidity
Definition
actual amount of water in the air
Term
relative humidity
Definition
amount of water vapor in the air compared with the amount of water
Term
psychrometer
Definition
instrument used to find relative humidity
Term
condensation
Definition
changing of a gas to a liquid
Term
dew point
Definition
temperature to which air must be cooled to reach saturation
Term
frost
Definition
ice formed from condensation below the freezing point of water
Term
cirrus cloud
Definition
light, feathery cloud
Term
cumulus cloud
Definition
big, puffy cloud
Term
stratus cloud
Definition
sheerlike cloud that forms layers across the sky
Term
precipitation
Definition
water that falls to Earth from the atmosphere
Term
rain gauge
Definition
device used to measure precipitation
Term
air mass
Definition
large volume of air with about the same temperature and amount of moisture throughout
Term
polar air mass
Definition
air mass that forms over cold regions
Term
tropical air mass
Definition
air mass that forms over warm regions
Term
front
Definition
boundary between air masses of different densities
Term
cold front
Definition
forward edge of a cold air mass, formed when a cold air mass pushes under a warm air mass
Term
warm front
Definition
forward edge of a warm air mass formed when a warm air mass pushes over a cold air mass
Term
thunderstorm
Definition
storm with thunder, lightening, and often heavy rain and strong winds
Term
tornado
Definition
small, very violent, funnel-shaped cloud that spins
Term
hurricane
Definition
tropical storm with very strong winds
Term
station model
Definition
record of weather information at a weather station
Term
millibar
Definition
unit of measurement for air pressure
Term
isobar
Definition
line on a weather map that connects points of equal air pressure
Term
isotherm
Definition
line on a weather map that joins places that have the same temperatures
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