Chapter 13 Review

The Nature of Storms

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Which is NOT a condition that must exist in order to produce a

thunderstorm?

1. a source of moisture

2. lifting of the air mass

3. an unstable atmosphere

4. a source of wind

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In what stage of a thunderstorm would an equal amount of

updrafts and downdrafts exist?

1. cirrus stage

2. cumulus stage

3. mature stage

4. dissipation stage

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What stage of a thunderstorm is

shown?

1. cirrus stage

2. cumulus stage

3. mature stage

4. dissipation stage

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What ultimately leads to a thunderstorm’s dissipation?

1. the production of downdrafts

2. the loss of a supply of cold air

3. the decrease in cloud droplets

4. the decrease of surface winds

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A tornado lasts 9 minutes, is 2 km wide and has wind speeds of

99 km/h. What intensity level would it be

classified?1. F0

2. F1

3. F2-F3

4. F4

Fujita Intensity Scale

Path Duration

Wind Speed

F0 up to 4 km

1-10 min

70-118 km/h

F1 up to 4 km

1-10 min

119-180 km/h

F2-F3 24 km +

20 min +

181-332 km/h

F4 80 km +

1 h + 333-500 km/h

F5 80 km +

1 h + 501-512 km/h

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How fast must the winds of a tornado be traveling to be classified as a F4

tornado?

1. 181-332 km/h

2. 333-500 km/h

3. 500-512 km/h

4. 119-180 km/h

Fujita Intensity Scale

Path Duration Wind Speed

F0 up to 4 km

1-10 min 70-118 km/h

F1 up to 4 km

1-10 min 119-180 km/h

F2-F3 24 km +

20 min + 181-332 km/h

F4 80 km +

1 h + 333-500 km/h

F5 80 km +

1 h + 501-512 km/h

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A tornado has lasted for 70

minutes and its path was 84 km

wide. What would its wind

speed have to be in order for it to be categorized as an

F4 tornado?

1. 332 km/h

2. 485 km/h

3. 502 km/h

4. 510 km/h

Fujita Intensity Scale

Path Duration Wind Speed

F0 up to 4 km

1-10 min 70-118 km/h

F1 up to 4 km

1-10 min 119-180 km/h

F2-F3 24 km + 20 min + 181-332 km/h

F4 80 km + 1 h + 333-500 km/h

F5 80 km + 1 h + 501-512 km/h

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When a storm over an ocean has wind speeds of 75 km/h what can

it be classified as?

1. a hurricane

2. a tropical depression

3. a tropical storm

4. a cyclone

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At which point would the strongest winds and densest

clouds of the hurricane be

located?1. the eye

2. the eyewall

3. the rainbands

4. the outer edge

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What is characteristic of the eye of the

hurricane?

1. the strongest winds and densest clouds

2. thunderstorms

3. light clouds and precipitation

4. calm weather and blue sky

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Because the hurricane is moving in a

counterclockwise direction, what can be

inferred about this hurricane?

1. The moving tropical disturbance which caused this hurricane came from the west.

2. The moving tropical disturbance which caused this hurricane came from the east.

3. This hurricane is occurring in the northern hemisphere.

4. This hurricane is occurring in the southern hemisphere.

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A hurricane has been classified as a

category 3 hurricane. Which of the

following is NOT true?

1. the hurricane can not get any stronger

2. the hurricane has winds of 200 km/h

3. the hurricane can not get any weaker

4. the hurricane has sea level changes of 4.0 m

Category Winds (km/h)

Change in sea level

Damage

5 >250 >5.5 m catastrophic

4 210-249 4.0-5.5 m extreme

3 178-209 2.8-3.7 m extensive

2 154-177 1.8-2.5 m moderate

1 119-153 1.2-1.5 m minimal

A hurricane hits land with wind

speeds of 225 km/h and sea level

changes of 5.5 m. What damage

classification would it be labeled as according to the Saffir-Simpson

Hurricane Scale?

Category Winds (km/h)

Change in sea level

Damage

5 >250 >5.5 m catastrophic

4 210-249 4.0-5.5 m extreme

3 178-209 2.8-3.7 m extensive

2 154-177 1.8-2.5 m moderate

1 119-153 1.2-1.5 m minimal

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2. moderate

3. extensive

4. extreme

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All public pools in a local city are free when the heat

index is at least 90°F. What is the minimum amount of

relative humidity needed for the pools to be free if the air

temperature is 85°F?

1. 60%

2. 10%

3. 80%

4. 50%

Air Temperature (ºF)

75 80 85 90

Relative Humidity (%)

Apparent Temperature (ºF)

0 69 73 78 83

10 70 75 80 85

20 72 77 82 87

30 73 78 84 90

40 74 79 86 93

50 75 81 88 96

60 76 82 90 100

70 77 85 93 106

80 78 86 97 113

90 79 88 102 122

100 80 91 108

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What air temperature and relative humidity produces

the same apparent temperature as when the air temperature is 90°F and the relative humidity is 40%?

1. 70°F, 85%

2. 75°F, 90%

3. 85°F, 60%

4. 85°F, 70%

Air Temperature (ºF)

75 80 85 90

Relative Humidity (%)

Apparent Temperature (ºF)

0 69 73 78 83

10 70 75 80 85

20 72 77 82 87

30 73 78 84 90

40 74 79 86 93

50 75 81 88 96

60 76 82 90 100

70 77 85 93 106

80 78 86 97 113

90 79 88 102 122

100 80 91 108

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Flooding occurs if an area receives 27 cm of total rainfall. If a storm lasts for 21 hours with a rainfall rate of 1.5 cm/h would the area become flooded?

1. Yes, because the area would receive 31.5 cm of rain.

2. No, because the area would receive 21 cm of rain.

3. Yes, because the area would receive 315 cm of rain.

4. Yes, because the area would receive 40.5 cm of rain.

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A(n) ____ thunderstorm forms because of unequal heating of Earth’s surface within one air

mass.

1. frontal mass

2. cold front

3. air mass

4. air pressure

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The rising, moist updrafts and the falling, cool downdrafts form a

convection cell that produces the ____ associated with thunderstorms.

1. temperatures

2. thunder

3. humidity

4. gusty surface winds

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Very severe thunderstorms can form when a ____ has a large continuous

supply of warm air to lift and condense.

1. cold front

2. warm air mass

3. warm front

4. tornado

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When friction between updrafts and downdrafts within a cumulonimbus

cloud creates regions of air with opposite charges, ____ forms.

1. warm air

2. lightning

3. precipitation

4. ozone

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____ are often associated with very severe thunderstorms called

supercells.

1. Tornadoes

2. Sea breezes

3. Hurricanes

4. Heat waves

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A mound of water driven toward coastal areas by hurricane winds

is called a ____.

1. cyclone

2. supercell

3. storm surge

4. cold front

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An extended period of well-below-normal rainfall is a ____.

1. flood

2. drought

3. heat wave

4. tropical cyclone

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The phenomenon in which the effects of cold air are worsened

by wind is the ____.

1. supercell

2. sea breeze

3. wind chill factor

4. cold wave

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Air under a large high-pressure system sinks, warms, and causes

above-normal temperatures

1. cold wave

2. drought

3. heat wave

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High pressure associated with continental polar or arctic air

1. cold wave

2. drought

3. heat wave

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Large, persistent high-pressure system associated with extended periods of below-normal rainfall

1. cold wave

2. drought

3. heat wave

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Diagram A would

most likely occur

during the night.1. True

2. False

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The weather in diagram A is more likely to produce a thunderstorm

than the weather in diagram B.

1. True

2. False

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The weather in diagram B would be

considered stable.

1. True

2. False

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The air circulates

counterclockwise in

diagram B because the water cools slower than

the land.

1. True

2. False

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The cumulonimbus clouds associated with thunderstorms form from cumulus clouds and

convection.

1. True

2. False

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All tropical cyclones thrive on the energy in warm and cold air

masses.

1. True

2. False

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A Category 2 hurricane on the Saffir-Simpson hurricane scale is more dangerous than a Category

5 hurricane.

1. True

2. False