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S-190, Unit 5 Atmospheric Stability, Winds, and Clouds

Total questions: 60

Worksheet time: 30mins

Name
Class
Date
1.

Atmospheric stability affects fire behavior in which of the following ways?

a)

Stable atmospheres suppress vertical air movement, reducing fire intensity.

b)

Stable atmospheres increase vertical air movement, enhancing fire intensity.

c)

Atmospheric stability has no effect on fire behavior.

d)

Stable atmospheres always cause unpredictable fire spread.

2.

Wind and its effects on fire behavior can be described as:

a)

Wind increases the spread and intensity of fire by supplying oxygen and moving flames.

b)

Wind always decreases fire intensity by cooling the flames.

c)

Wind has no effect on fire behavior.

d)

Wind causes fire to extinguish quickly.

3.

Cloud classifications and their impact on fire behavior can be explained as:

a)

Cloud types influence fire behavior by affecting humidity, wind, and precipitation.

b)

Cloud classifications have no impact on fire behavior.

c)

Only cumulus clouds affect fire behavior.

d)

Clouds always suppress fire regardless of type.

4.

Smoke layers and clouds are similar in their impact on fire behavior because:

a)

Both can limit visibility and affect heat transfer during a fire.

b)

Smoke layers increase fire spread while clouds decrease it.

c)

Clouds always increase humidity, but smoke layers do not.

d)

Smoke layers are only found indoors, while clouds are only outdoors.

5.

What does atmospheric stability refer to?

a)

The degree to which horizontal motion in the atmosphere is either enhanced or suppressed.

b)

The degree to which vertical motion in the atmosphere is either enhanced or suppressed.

c)

The amount of precipitation in the atmosphere.

d)

The temperature of the atmosphere.

6.

Fill in the blank: Surface winds are associated with __________ motion.

a)

Horizontal

b)

Vertical

c)

Rotational

d)

Oscillatory

7.

Which type of motion is associated with stability in the atmosphere?

a)

Only horizontal motion

b)

Only vertical motion

c)

Both vertical and horizontal motion

d)

No motion

8.

Winds aloft are associated with which type of motion?

a)

Vertical motion

b)

Horizontal motion

c)

Circular motion

d)

No motion

9.

What causes the balloon to rise?

a)

The balloon is heavier than the air outside

b)

Hot air inside the balloon is less dense than the environmental air outside

c)

The balloon is filled with water

d)

The environmental air is colder than the balloon

10.

As temperatures warm, the density of the environmental air ________, causing the balloon to descend.

a)

rises

b)

falls

c)

remains the same

d)

fluctuates

11.

A stable atmosphere is indicated when the air parcel temperature is _______ than the environmental temperature.

a)

lower

b)

higher

c)

equal

d)

much higher

12.

Which type of cloud is commonly associated with stable atmospheric conditions?

a)

Cumulus

b)

Stratus

c)

Cirrus

d)

Nimbus

13.

What is the name of the clouds that form over mountains in stable air conditions according to the diagram?

a)

Mountain Wave Clouds

b)

Cumulonimbus Clouds

c)

Stratus Clouds

d)

Cirrus Clouds

14.

Which of the following is a visual indicator of stable air near the ground as shown in the diagram?

a)

Hazy

b)

Thunderstorm

c)

Tornado

d)

Snow

15.

What type of weather phenomenon is indicated by the presence of fog in stable atmospheric conditions?

a)

Fog

b)

Thunderstorm

c)

Hailstorm

d)

Tornado

e)

Drizzle

16.

What type of cloud is shown as a visual indicator of an unstable atmosphere in the image?

a)

Cumulonimbus

b)

Stratus

c)

Cirrus

d)

Nimbostratus

17.

Which phenomenon is associated with an active fire and is a sign of atmospheric instability?

a)

Towering smoke plume

b)

Gentle breeze

c)

Light drizzle

d)

Clear sky

18.

What is the name of the rotating column of air and fire shown near the active fire in the image?

a)

Firewhirl

b)

Dust devil

c)

Tornado

d)

Cyclone

19.

Which weather event is a sign of unstable atmospheric conditions and involves electrical discharge?

a)

Lightning

b)

Fog

c)

Drought

d)

Hail

20.

Which term describes precipitation that evaporates before reaching the ground, as shown in the image?

a)

Virga

b)

Graupel

c)

Sleet

d)

Drizzle

21.

Which visual indicator in the image suggests that smoke will disperse well in an unstable atmosphere?

a)

Good smoke dispersal

b)

Smoke rising in a straight line

c)

Smoke forming a dense cloud near the ground

d)

Smoke moving slowly and staying close to the source

22.

Which visual indicator in the image suggests strong air movement in an unstable atmosphere?

a)

Gusty winds

b)

Calm skies

c)

Light breezes

d)

Clear visibility

23.

Which visual indicator in the image suggests that visibility is high in an unstable atmosphere?

a)

Good visibility

b)

Low visibility

c)

Hazy conditions

d)

Obscured horizon

24.

Which type of cloud is labeled as a visual indicator of an unstable atmosphere on the right side of the image?

a)

Towering cumulus

b)

Stratus

c)

Cirrus

d)

Nimbostratus

25.

What is an inversion?

a)

A layer of very unstable air

b)

A layer of very stable air

c)

A type of cloud

d)

A weather front

26.

An inversion acts like a cap or lid to severely limit the ______ movement of air.

a)

upward

b)

sideways

c)

circular

d)

downward

27.

An inversion allows for the free upward movement of air.

a)

True

b)

False

28.

Fill in the blank: The image demonstrates an atmospheric ________, where a warm layer sits above cooler air near the surface.

a)

inversion

b)

front

c)

cyclone

d)

convection

29.

Based on the image titled 'Recognizing a Dissipating Inversion', what atmospheric phenomenon is being illustrated?

a)

A dissipating inversion (where a layer of cool air trapped under warm air is breaking up, often seen as fog or low clouds lifting).

b)

A developing thunderstorm (characterized by towering cumulonimbus clouds).

c)

A stable air mass (where temperature remains constant with height and no mixing occurs).

d)

A cold front passage (marked by a sudden drop in temperature and gusty winds).

30.

Fill in the blank: Wind is the ________ movement of air relative to the surface of the earth.

a)

horizontal

b)

vertical

c)

circular

d)

random

31.

What is wind direction?

a)

The speed at which wind is blowing

b)

The compass direction from which wind is blowing

c)

The temperature of the wind

d)

The humidity in the air

32.

Fill in the blank: Wind direction is the ______ direction from which wind is blowing.

a)

compass

b)

clockwise

c)

vertical

d)

random

33.

Which type of wind is shown at the surface level in the diagram?

a)

General winds

b)

Small scale local winds

c)

20 foot (surface) winds

d)

Midflame wind

34.

Fill in the blank: ______ are winds which are generated over a comparatively small area by local terrain and weather. They differ from those which would be appropriate to the general pressure pattern.

a)

Local Winds

b)

Trade Winds

c)

Jet Streams

d)

Monsoon Winds

35.

What is the typical speed range for downslope winds?

a)

2-5 mph

b)

10-15 mph

c)

20-25 mph

d)

30-35 mph

36.

When dealing with 'Land and Sea Breezes', which type of breeze occurs during the late evening or night?

a)

Sea breeze

b)

Land breeze

c)

Mountain breeze

d)

Valley breeze

37.

During late morning, which direction does the sea breeze move?

a)

From land to sea

b)

From sea to land

c)

From mountain to valley

d)

From valley to mountain

38.

True or False: Land breezes occur during the late morning.

a)

True

b)

False

39.

Based on the image titled 'Mid-Flame Wind Effects On Flame Height', what effect does mid-flame wind have on flame height?

a)

Increases flame height

b)

Decreases flame height

c)

Has no effect on flame height

d)

Only affects flame color

40.

Which of the following is most likely a result of strong winds during a wildfire?

a)

A) Increased fire spread

b)

B) Reduced smoke production

c)

C) Lower temperatures

d)

D) Fire extinguishes quickly

41.

Look at the image of the sky shown. What is the main type of cloud visible in the image?

a)

Cumulus

b)

Stratus

c)

Cirrus

d)

Nimbus

42.

What is the definition of clouds?

a)

A visible collection of moisture suspended in the atmosphere.

b)

A solid mass found underground.

c)

A type of plant that grows in deserts.

d)

A device used to measure temperature.

43.

Which type of cloud is shown on the right side of the image?

a)

Stable

b)

Unstable

44.

Which type of cloud is described as 'rings or irritable bands across sky indicating jet stream location'?

a)

A) Cirrus Streaks

b)

B) Altostratus

c)

C) Cumulus

d)

D) Stratus

45.

Fill in the blank: ________ clouds are dense, in patches, not increasing, or with tufts. No significant fire behavior expected.

a)

Cirrus

b)

Cumulus

c)

Stratus

d)

Nimbus

46.

Match the following cloud types to their descriptions:

a)

Rings or irritable bands across sky indicating jet stream location

1.

Cirrus Streaks

b)

Usually dense enough to block out sun or moon, can contain steady rain

2.

Altostratus / Nimbostratus

c)

Strong downdraft winds, rain, hail, lightning possible

3.

Mature Thunderstorm

47.

Altocumulus Castellatus clouds are often indicators of severe weather and thunderstorms.

a)

True

b)

False

48.

Which cloud type is usually associated with fire weather instability and gusty winds?

a)

A) Fair Weather Cumulus

b)

B) Mature Thunderstorm

c)

C) Altocumulus Castellatus

d)

D) Stratus

49.

Fill in the blank: ________ clouds are formed by strong winds, running fire, and are a concern for fire weather.

a)

Wave Clouds (AGLS)

b)

Cumulus Clouds

c)

Stratus Clouds

d)

Cirrus Clouds

50.

Which special case is described as 'Rapidly rotating column of air, often visible as a funnel'?

a)

Fire Whirl

b)

Tornado

c)

Virga

d)

Brief Cloud

51.

Fill in the blank: ________ is rain or snow that evaporates before reaching the ground, often associated with dry fire behavior.

a)

Virga

b)

Graupel

c)

Sleet

d)

Drizzle

52.

Smoke layers mimic clouds in modifying the fire environment by changing: _________.

a)

Atmospheric Stability

b)

Wind Speed

c)

Soil Moisture

d)

Vegetation Type

53.

Smoke layers mimic clouds in modifying the fire environment by changing: _________.

a)

Fire Behavior

b)

Soil Composition

c)

Water Table Levels

d)

Animal Migration Patterns

54.

Clouds or smoke columns that grow vertically indicate a(n) ______ atmosphere.

a)

unstable

b)

stable

c)

humid

d)

cold

55.

A smoke column that spreads out after limited rise indicates a(n) ______ atmosphere.

a)

stable

b)

unstable

c)

humid

d)

dry

56.

Fill in the blanks. 1. Wind direction is the direction ________ which the wind is blowing.

a)

from

b)

to

c)

by

d)

with

57.

Fill in the blanks. General wind is a ________ scale wind associated with high and low pressure.

a)

large

b)

small

c)

medium

d)

local

58.

Local wind is a ________ scale wind.

a)

small

b)

large

c)

medium

d)

global

59.

Fill in the blanks. 4. (True or False). Wind is the most critical factor affecting fire behavior.

a)

True

b)

False

60.

The direction of the fire spread and smoke transport are mostly determined by _______________.

a)

direction of wind

b)

temperature of the fire

c)

type of vegetation

d)

humidity level