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An air mass that forms over an ocean is called ?

A maritime air mass

What are lines joining places that have the same temperature?

isotherms

Cool, clear weather usually follows a _________ front.

Cold Front

________________is a sudden spark or electrical discharge, as electrical charges that jump between parts of a cloud or between a cloud and the ground.

Lightning

On a weather map,________________ join places on the map with the same air pressure.

isobars

If you observe air pressure decreasing, what kind of weather do you think is coming?

Clouds and precipitation

A thermometer measures

Air Temperature

In Fahrenheit the freezing point of water is….

32 degrees Fahrenheit

In Celsius the boiling point of water is …

100 degrees Celsius

How are air masses classified?

By Temperature and Humidity

A rapidly moving cold air mass meets a slowly moving warm air mass and forms a front. What will most likely occur at this front?

Cold air will slide under the warm air. Warm air will rise and cool and clouds will form.

What is the main way the troposphere is heated?

Convection Currents

What are the three major global wind belts?

Trade Winds, Polar Easterlies and the Prevailing Westerlies

The two areas of calm are

The Doldrums and the Horse Latitudes

The instrument used to measure wind speed is called a

Anemometer

A scientist who studies the causes of weather and tries to predict weather is called a ______?

Meteorologist

Bands of high speed winds above the Earth’s surface are called__________?

Jet Streams

The increased cooling that a wind can cause is called

The Wind Chill Factor

What is the natural process where gases hold heat in the air called?

The Greenhouse Effect

What is an air mass?

A large body of air that has similar temperature, humidity and air pressure throughout.

Name 4 types of fronts?

A. Warm B. Cold C. Stationary D. Occluded

How are air masses moved in the US?

A. Jet Streams B. Prevailing Westerlies

A polar air mass has _____________pressure?

High

The boiling point of water in Fahrenheit is …

212 degrees fahrenheit

A cold air mass and a warm air mass meet and remain stalled over an area is a ____________________front.

Stationary Front

What causes winds?

Differences in air temperature and pressure caused by the uneven heating of the Earth’s surface

When a warm air mass slides over a cold air mass a _________front is formed.

Warm Front

When a warm air mass is caught between two cooler air masses a(n) _________ front is formed.

Occluded Front

Winds that are found between 0 and 30 degrees latitude are called

Trade Winds

I am a front that brings light rain for several days. ____________

Warm or Stationary

Winds that are found between 30 and 60 degrees latitude are called

The Prevailing Westerlies

I am a front that brings severe weather. (Heavy downpours, gusty winds and cooler temperatures)

Cold Front or Occluded Front

Name this front?

Lower pressure usually means clouds, rain, or snow.

Higher pressure usually means nice, clear weather.