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27 Cards in this Set
- Front
- Back
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What is the process of a solid changing into a liquid
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Melting
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What are lines on a map along which the temperature is the same called
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Isotherms
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What are lines on a map along which the air pressure is the same called
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Isobars
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What temperature must the air be for snow to occur
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32 degrees F
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What are the three main types of clouds
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Stratus, cumulus, and cirrus
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When dew point of the air is reached, what is the relative humidity
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100%
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What is a cloud on the ground called
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Fog
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What are gases and liquids collectively called
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Fluids
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Grams over meters cubed is a measure of what
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Humidity
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When the temperature of the air decreases, what happens to the humidity
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It stays the same
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What is the cumulus cloud associated with
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Fair weather
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Which holds more water vapor, warm or cold air
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Warm
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What is the name for a low pressure system
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Cyclone
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A percentage is a measure of what
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Relative humidity
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What is the definition of relative humidity
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How much water vapor is in the air compared to how much water vapor it can hold at htat temperature
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When the temperature of the air increases, what happens to the relative humidity
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Decreases
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When the temperature of the air decreases, what happens to the relative humidity
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Increases
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What kind of weather is the cumulonimbus cloud associated with
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Hail, thunderstorms, nad tornadoes
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Describe a cirrus cloud
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Cirrus means thin, wispy. This is a high altitude cloud that is usually made of ice crystals
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Describe nimbo stratus
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Nimbo means rain and stratus means spread out. These clouds usually mean rain, but not always thunderstorms. It is a low altitude cloud
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What is a front
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Teh boundary between two air masses
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Where do dry air masses form
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Over land
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Where do humid air masses
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Over a large body of water (usually an ocean)
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Why is the wet bulb reading on a sling psychrometer usually lower than the dry bulb reading
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The wet bulb is uaully colder because when you sling it, it speeds up evaporation. Because evaporation is a cooling process the wet bulb becomes colder than the dry bulb
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When air reaches dew point what occurs
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Condensation
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What are the characteristics of a maritime tropical air mass
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Humid and warm
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What are the characteristics of a continental polar air mass
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Dry and cold
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