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45 Cards in this Set

  • Front
  • Back
air pollution
the presence of harmful substances in the air
air pressure
the weight of air pushing down on something
altitude
the height above sea level; also called elevation
anemometer
a weather instrument that measures wind speed
air
a mixture of gases that surround the earth
air mass
a large bubble of air that has about the same temperature and humidity throughout
atmosphere
the air that surrounds the earth
blizzard
a snowstorm with high winds and low temperatures
barometer
a weather instrument that measures air pressure
climate
the general weather of an area over a long period of time
cloud
a mass of water droplets or ice crystals that have clumped together in the atmosphere
cirrus clouds
high, feathery clouds made up of ice crystals
cold front
the leading edge of a moving mass of cooler air
cumulonimbus clouds
huge vertical clouds that can produce a thunderstorm
cumulus clouds
puffy white clouds with a flat bottom
el nino
a temporary change in the climate caused by temperature shifts in the pacific ocean
flash flood
a sudden rush of water that overflows a stream after a heavy rain
fog
a layered cloud that forms close to the ground
front
a place where one air mass meets and pushes aside another air mass
greenhouse effect
the process of earth's atmosphere trapping heat near the surface
high pressure
an area where the air pressure is higher than it is in surrounding areas
humidity
water vapor in the air
hurricane
a very large and violent tropical storm
hydrosphere
all the liquid water and ice on the earth's surface, liquid water in the ground, and water vapor in the atmosphere
hygrometer
a weather instrument that measures relative humidity
low pressure
an area where the air pressure is lower than it is in surrounding areas
mesosphere
the middle layer of the earth's atmosphere
nimbostratus clouds
low gray clouds that produce rain or snow
polar climate
a cold dry climate located in bands around the north and south poles
precipitation
water that falls to the ground in the form of rain, snow, sleet, or hail
relative humidity
the amount of water vapor that the air is holding compared with the amount of water it could hold
stratosphere
the second lowest layer of air in the earth's atmosphere
stratus clouds
flat gray clouds that cover the sky
temperate climate
a climate with temperatures that change with the seasons and precipitation that varies from place to place and season to season
thermosphere
the second highest layer of the earth's atmosphere
thunderstorm
a storm with lightning, thunder, rain, and sometimes hail
tornado
a dark funnel of strong winds that spiral upward from the ground
tropical climate
a warm climate located in a wide band around the equator
troposphere
the first layer of the earth's atmosphere; weather takes place here
warm front
a the leading edge of a moving mass of warmer air
weather
the condition of the atmosphere at a certain place for a short period of time
weather forecaster
a person who predicts what the weather may be based on weather data
weather system
an area in the lower atmosphere where the air is moving around a high pressure area or a low pressure area
wind
moving air
wind vane
a weather instrument that shows the direction the wind is coming from