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Weather Instruments

Forecasting the weather

Severe weather &

fronts

Terms to Know

Grab bag

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Instrument used to measure windspeed

Answer

Anemometer

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Technology that can save lives by warning people of

an approaching storm

Answer

Doppler radar

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An instrument that measures relative humidity with 2 thermometers

Answer

Psychrometer

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Used to measure atmospheric pressure

Answer

Barometer

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What layer of the atmosphere does our weather occur in?

Answer

Troposphere

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What type of air mass is dry and warm, and originates in SW USA or Mexico?

Answer

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Continental Tropical

Weather map symbols H & L indicate what kind of

centers?

Answer

Air pressure centers (or High and Low pressure)

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This system uses reflected radio waves

to determine the velocity and location

of objects called: _____

Answer

radar

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Weather conditions for an area over a long period of

time are referred to as __________

Answer

Climate

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The temperature at which the rate of evaporation equals the rate of condensation

Answer

Dew Point

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The front edge of an advancing warm air mass that replaces

colder air with warmer air is a

_______

Answer

Warm Front

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What kind of front has similar weather to a

cold front because of a fast-moving front

overtaking a warm one?

Answer

Occluded Front

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This forms when a cold air mass over takes a warm air mass and

causes violent storms

Answer

Cold front

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What is a large body of air throughout which temp

and moisture content are similar

Answer

Air Mass

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A front at which air masses move either very slowly or not at all, and have weather similar to

that of a warm front

Answer

Stationary front

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Answer

Mass of water vapor contained in a given volume

of air is ______

Absolute humidity

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What kind of pressure system brings warmer

temps, cloudy skies, and stormy weather?

Answer

Low Pressure

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The ratio of the amount of water in

the air to the amount of water vapor needed to reach saturation at a given temperature

Answer

Relative Humidity

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What is issued when severe weather has

been spotted in a given area?

Answer

Warning

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Answer

Cool, clear skies and fair weather come from what type of pressure

system?

High Pressure System

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What part of the water cycle involves liquid water

changing to water vapor?

Answer

Evaporation

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What part of the water cycle involves water vapor

changing back into liquid water?

Answer

Condensation

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Which air mass originates in the Arctic and Canada, and

is cool and dry?

Answer

Continental Polar

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Which air mass originates in the Gulf of Mexico, and is

warm and moist?

Answer

Maritime Tropical

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2 major factors used to identify climate are:

Answer

Temperature & precipitation

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