Air Masses And Fronts Flashcards

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0
Q

In the continental U.S. Air masses are commonly moved by what

A

Prevailing westerlies and jet streams

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1
Q

What are the four major types of air masses influence the weather in North America

A

Maritime tropical
Continental tropical
Maritime polar
Continental polar

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2
Q

Colliding air masses can form four types of fronts. What are they

A

Cold fronts
Warm fronts
Stationary fronts
Occluded fronts

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3
Q

All year around most precipitation begins in what

A

Clouds as snow

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4
Q

Cumulonimbus clouds are also known as what

A

Thunderheads

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5
Q

Meteorologist you what to analyze whether

A

Maps charts computers

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6
Q

Technological improvements in gathering weather data and using computers have improved accuracy of what

A

Weather forecasts

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7
Q

Summer is in the Southwest are hot and dry because of what type of air mass

A

Maritime tropical

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8
Q

Cumulonimbus clouds may produce both thunderstorms and what

A

Hurricanes

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9
Q

What is a sudden spark or electrical discharge as electrical charges jump between parts of a cloud between nearby clouds or between a cloud in the ground

A

Lightning

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10
Q

On the weather map what joins places on the map with the same air pressure

A

Isotherms

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11
Q

A huge body of air that is similar temperature humidity and air pressure at any given height

A

air mass

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12
Q

A warm air mass that forms in the tropics and has low air pressure

A

Topical

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13
Q

A cold air mass that forms north of 50° North latitude or south of 50° South latitude and has a high air pressure

A

Polar

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14
Q

A humid air mass that forms over oceans

A

Maritime

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15
Q

A dry air mass that forms Overland

A

Continental

16
Q

The boundary where unlike air masses meet but do not mix

A

Front

17
Q

Cut off as in the front where a warm air mass is caught between two cooler air masses

A

Occluded

18
Q

A violent disturbance in the atmosphere

A

Storm

19
Q

A small storm often accompanied by heavy precipitation and frequent thunder and lightning

A

Thunderstorm

20
Q

A rapidly whirling funnel shaped cloud that reaches down to touch earths surface

A

Tornado

21
Q

A tropical storm that has winds of about 119 kilometers per hour or higher

A

Hurricane

22
Q

A dome of water that sweeps across the coast where a hurricane lands

A

Storm surge

23
Q

Scientists who study the causes of weather and try to predict it

A

Meteorologist

24
Q

A line on the weather map that joins places that have the same air pressure

A

Isobar

25
Q

A line on the weather map that joins places that had the same temperature

A

Isotherm

26
Q

Standard symbols on weather maps show what

A

From areas of high low pressure types of precipitation and temperatures

27
Q

What are the three main types of clouds based on the shape

A

Cumulus clouds serous clouds Stratus clouds

28
Q

What are the nine types of clouds

A

Cumulonimbus cumulus stratus nimbostratus altostratus Cirrocumulus fog cirrus altocumulus

29
Q

Any form of water that falls from the clouds and reaches Earth’s surface

A

Precipitation

30
Q

What measures relative humidity

A

Sling psychrometer

31
Q

In the middle latitudes between 30° and 60° north and south winds that blow towards the polls are turned toward the east by the corilis effect

A

Prevailing westerlies

32
Q

At about 30° North and South latitude the air stops moving toward the poles and sinks

A

Horse latitudes

33
Q

Regions near the equator with little or no wind are called the what

A

Doldrums