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Earth Science (9th) > Ch. 21 Quiz > Flashcards

Ch. 21 Quiz Flashcards

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1
Q

As lower air is warmed, the air ___.

A

rises

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2
Q

a large body of air throughout which temperature and moisture content is similar

A

air mass

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3
Q

air masses responsible for cool, dry air in northern summers

A

continental polar

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4
Q

a weather system in which the air sinks and flows outward from a center of high pressure, that brings dry weather

A

an anticyclone

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5
Q

A hurricane begins when warm, moist air rises rapidly and the moisture condenses, releasing energy in the form of ___.

A

latent heat

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6
Q

What does radar use to determine the velocity and location of objects?

A

radio waves

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7
Q

Scientists study upper-atmospheric conditions to ___.

A

track global weather patterns

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8
Q

What tool do meteorologists use to solve mathematical equations and store data?

A

a computer

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9
Q

Doppler radar and satellite images provide information to create ___.

A

station models

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10
Q

What type of weather have meteorologists tried to control with freezing nuclei?

A

hurricanes

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11
Q

Symbols communicate weather data in a ___.

A

station model

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12
Q

What do the weather map symbols H and L indicate?

A

air-pressure centers

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13
Q

lines on a weather map that connect points of equal atmospheric pressure

A

isobars

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14
Q

a severe storm that develops over tropical oceans, whose strong winds spiral in toward the intense low-pressure center

A

hurricane

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15
Q

an instrument used to measure wind speed

A

anemometer

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16
Q

an air mass that originates in southern Atlantic and Pacific areas and brings warm, moist air

A

Maritime tropical

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17
Q

an instrument that measures atmospheric pressure

A

barometer

18
Q

a usually brief, heavy storm with rain, wind, lightning and thunder

A

thunderstorm

19
Q

an air mass that originates in Canada and brings cold, dry air

A

Continental polar

20
Q

the front edge of advancing warm air mass that replaces colder air with warmer air

A

warm front

21
Q

instrument that is used to determine the direction of the wind

A

wind vane

22
Q

a destructive, rotating, funnel-shaped column of air with high wind speeds

A

tornado

23
Q

an air mass that originates in the southwestern United States and brings warm, dry air

A

Continental tropical

24
Q

the front edge of a moving mass of cold air that pushes beneath a warmer air mass like a wedge

A

cold front

25
Q

an instrument that measures temperature

A

thermometer

26
Q

What are the five types of fronts?

A
  1. Cold front
  2. Warm front
  3. Stationary
  4. Occluded
  5. Polar front
27
Q

cold air mass moves under a warm air mass and lifts the warm mass completely off the ground

A

occluded front

28
Q

What program was designed to promote the rapid exchange of weather information?

A

World Weather Watch

29
Q

areas of low pressure that are characterized by rotating wind which moves toward the rising air of the center, low pressure region

A

midlatitude cyclones

30
Q

the boundary where cold air meets warm tropical air

A

polar front

31
Q

In a polar front, a cold air mass sits over each pole until about ___ degrees ___.

A

60 degrees latitude

32
Q

the discharge of electricity

A

lightning

33
Q

front of an air mass that moves very slowly or not at all

A

stationary front

34
Q

What two things must a hurricane have to form?

A
  1. Must form over a warm tropical ocean

2. Must have the Coriolis effect

35
Q

What rates hurricane intensity from 1-5?

A

the Saffir-Simpson scale

36
Q

Symbols & colors are used to communicate weather data on a ___.

A

weather map

37
Q

issued when conditions are ideal for severe weather

A

Watch

38
Q

What type of storm have scientists seeded with silver-iodide nuclei?

A

lightning

39
Q

Where are tornadoes most common?

A 
Tornado Alley
(Texas through midwestern US)
40
Q

48 hour range predictions

A

daily forecasts

41
Q

issued when severe weather has been spotted or is expected

A

Warning

Earth Science (9th) (14 decks)

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