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19 terms

Earth Science Chapter 16 Vocabulary (Holt)

STUDY
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relative humidity
amount of moisture the air contains compared with the maximum it can hold at a given temperature
cyclone
area of lower pressure and winds that spiral toward the center
barometer
mercury-filled glass tube that measures air pressure
front
boundary between two air masses
lightning
an electric discharge between two opposite charged surfaces
precipitation
water in solid or liquid form that falls from the air to Earth
isobar
line on a weather map connecting points of equal pressure
tornado
funnel cloud that touches the ground
humidity
amount of moisture in the air
weather
condition of the atmosphere at a certain time and place
thunderstorm
small, intense weather system with rain, strong winds, thunder, and lightning
thermometer
mercury-filled glass tube that measures air temperature
hurricane
large,rotating tropical weather system with high-speed winds
condensation
when water vapor becomes a liquid
anticyclone
area of higher pressure with winds that spiral outward
cloud
collection of millions of tiny water droplets or ice crystals
anemometer
rotating cups that measure wind speed
air mass
large body of air that has similar temperature and moisture throughout
thunder
sound that results from the rapid expansion of air along a lightning strike