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Chapter 5
Weather
29
Science
5th Grade
12/09/2013

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Term
air mass
Definition
a large body of air that has about the same temperature and moisture
Term
weather forecast
Definition
a prediction of future weather conditions.
Term
hurricane
Definition
a storm with spiraling winds that forms over the ocean
Term
barometer
Definition
an instrument that measures air pressure
Term
weather watch
Definition
conditions are right for a type of severe weather, but that weather is not currently happening
Term
clouds
Definition
form from condensed water vapor or ice crystals
Term
snow
Definition
forms when ice crystals in the clouds join together and fall to the earth
Term
sleet
Definition
forms when liquid raindrops fall through air that is below freezing
Term
rain
Definition
forms when water droplets in the clouds join together to form larger drops before falling to the earth
Term
hail
Definition
ice that falls during warm weather
Term
weather warning
Definition
means the storm has begun and people have reported seeing it
Term
anemometer
Definition
measures the speed of wind
Term
precipitation
Definition
moisture that falls from the atmosphere and reaches the ground
Term
wind
Definition
moving air
Term
thunderstorm
Definition
occurs when a large, swift-moving warm air mass meets a cold air mass.
Term
4 types of precipitation
Definition
rain, snow, frost, sleet
Term
wind vane
Definition
shows the direction from which the wind is blowing
Term
meteorologist
Definition
study the atmosphere and the weather
Term
front
Definition
the boundary where two unlike air masses meet
Term
weather
Definition
the condition of the atmosphere at any moment in time
Term
troposphere
Definition
the first layer of the atmosphere where weather takes place
Term
altitude
Definition
the measurement of the distance above sea level
Term
atmosphere
Definition
the thin blanket of gases and dust particles that surround and protect the earth
Term
air pressure
Definition
the weight of air
Term
humidity
Definition
water vapor in the atmosphere
Term
humidity
Definition
water vapor in the atmosphere
Term
nimbus
Definition
will produce precipitation
Term
local winds
Definition
winds that are influenced by temperature changes in a small area
Term
global winds
Definition
winds that move in large circular belts around the earth
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