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WorksheetsS-190, Unit 5 Atmospheric Stability, Winds, and Clouds
Total questions: 60
Worksheet time: 30mins
Atmospheric stability affects fire behavior in which of the following ways?
Stable atmospheres suppress vertical air movement, reducing fire intensity.
Stable atmospheres increase vertical air movement, enhancing fire intensity.
Atmospheric stability has no effect on fire behavior.
Stable atmospheres always cause unpredictable fire spread.
Wind and its effects on fire behavior can be described as:
Wind increases the spread and intensity of fire by supplying oxygen and moving flames.
Wind always decreases fire intensity by cooling the flames.
Wind has no effect on fire behavior.
Wind causes fire to extinguish quickly.
Cloud classifications and their impact on fire behavior can be explained as:
Cloud types influence fire behavior by affecting humidity, wind, and precipitation.
Cloud classifications have no impact on fire behavior.
Only cumulus clouds affect fire behavior.
Clouds always suppress fire regardless of type.
Smoke layers and clouds are similar in their impact on fire behavior because:
Both can limit visibility and affect heat transfer during a fire.
Smoke layers increase fire spread while clouds decrease it.
Clouds always increase humidity, but smoke layers do not.
Smoke layers are only found indoors, while clouds are only outdoors.
What does atmospheric stability refer to?
The degree to which horizontal motion in the atmosphere is either enhanced or suppressed.
The degree to which vertical motion in the atmosphere is either enhanced or suppressed.
The amount of precipitation in the atmosphere.
The temperature of the atmosphere.
Fill in the blank: Surface winds are associated with __________ motion.
Horizontal
Vertical
Rotational
Oscillatory
Which type of motion is associated with stability in the atmosphere?
Only horizontal motion
Only vertical motion
Both vertical and horizontal motion
No motion
Winds aloft are associated with which type of motion?
Vertical motion
Horizontal motion
Circular motion
No motion
What causes the balloon to rise?
The balloon is heavier than the air outside
Hot air inside the balloon is less dense than the environmental air outside
The balloon is filled with water
The environmental air is colder than the balloon
As temperatures warm, the density of the environmental air ________, causing the balloon to descend.
rises
falls
remains the same
fluctuates
A stable atmosphere is indicated when the air parcel temperature is _______ than the environmental temperature.
lower
higher
equal
much higher
Which type of cloud is commonly associated with stable atmospheric conditions?
Cumulus
Stratus
Cirrus
Nimbus
What is the name of the clouds that form over mountains in stable air conditions according to the diagram?
Mountain Wave Clouds
Cumulonimbus Clouds
Stratus Clouds
Cirrus Clouds
Which of the following is a visual indicator of stable air near the ground as shown in the diagram?
Hazy
Thunderstorm
Tornado
Snow
What type of weather phenomenon is indicated by the presence of fog in stable atmospheric conditions?
Fog
Thunderstorm
Hailstorm
Tornado
Drizzle
What type of cloud is shown as a visual indicator of an unstable atmosphere in the image?
Cumulonimbus
Stratus
Cirrus
Nimbostratus
Which phenomenon is associated with an active fire and is a sign of atmospheric instability?
Towering smoke plume
Gentle breeze
Light drizzle
Clear sky
What is the name of the rotating column of air and fire shown near the active fire in the image?
Firewhirl
Dust devil
Tornado
Cyclone
Which weather event is a sign of unstable atmospheric conditions and involves electrical discharge?
Lightning
Fog
Drought
Hail
Which term describes precipitation that evaporates before reaching the ground, as shown in the image?
Virga
Graupel
Sleet
Drizzle
Which visual indicator in the image suggests that smoke will disperse well in an unstable atmosphere?
Good smoke dispersal
Smoke rising in a straight line
Smoke forming a dense cloud near the ground
Smoke moving slowly and staying close to the source
Which visual indicator in the image suggests strong air movement in an unstable atmosphere?
Gusty winds
Calm skies
Light breezes
Clear visibility
Which visual indicator in the image suggests that visibility is high in an unstable atmosphere?
Good visibility
Low visibility
Hazy conditions
Obscured horizon
Which type of cloud is labeled as a visual indicator of an unstable atmosphere on the right side of the image?
Towering cumulus
Stratus
Cirrus
Nimbostratus
What is an inversion?
A layer of very unstable air
A layer of very stable air
A type of cloud
A weather front
An inversion acts like a cap or lid to severely limit the ______ movement of air.
upward
sideways
circular
downward
An inversion allows for the free upward movement of air.
True
False
Fill in the blank: The image demonstrates an atmospheric ________, where a warm layer sits above cooler air near the surface.
inversion
front
cyclone
convection
Based on the image titled 'Recognizing a Dissipating Inversion', what atmospheric phenomenon is being illustrated?
A dissipating inversion (where a layer of cool air trapped under warm air is breaking up, often seen as fog or low clouds lifting).
A developing thunderstorm (characterized by towering cumulonimbus clouds).
A stable air mass (where temperature remains constant with height and no mixing occurs).
A cold front passage (marked by a sudden drop in temperature and gusty winds).
Fill in the blank: Wind is the ________ movement of air relative to the surface of the earth.
horizontal
vertical
circular
random
What is wind direction?
The speed at which wind is blowing
The compass direction from which wind is blowing
The temperature of the wind
The humidity in the air
Fill in the blank: Wind direction is the ______ direction from which wind is blowing.
compass
clockwise
vertical
random
Which type of wind is shown at the surface level in the diagram?
General winds
Small scale local winds
20 foot (surface) winds
Midflame wind
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.
Local Winds
Trade Winds
Jet Streams
Monsoon Winds
What is the typical speed range for downslope winds?
2-5 mph
10-15 mph
20-25 mph
30-35 mph
When dealing with 'Land and Sea Breezes', which type of breeze occurs during the late evening or night?
Sea breeze
Land breeze
Mountain breeze
Valley breeze
During late morning, which direction does the sea breeze move?
From land to sea
From sea to land
From mountain to valley
From valley to mountain
True or False: Land breezes occur during the late morning.
True
False
Based on the image titled 'Mid-Flame Wind Effects On Flame Height', what effect does mid-flame wind have on flame height?
Increases flame height
Decreases flame height
Has no effect on flame height
Only affects flame color
Which of the following is most likely a result of strong winds during a wildfire?
A) Increased fire spread
B) Reduced smoke production
C) Lower temperatures
D) Fire extinguishes quickly
Look at the image of the sky shown. What is the main type of cloud visible in the image?
Cumulus
Stratus
Cirrus
Nimbus
What is the definition of clouds?
A visible collection of moisture suspended in the atmosphere.
A solid mass found underground.
A type of plant that grows in deserts.
A device used to measure temperature.
Which type of cloud is shown on the right side of the image?
Stable
Unstable
Which type of cloud is described as 'rings or irritable bands across sky indicating jet stream location'?
A) Cirrus Streaks
B) Altostratus
C) Cumulus
D) Stratus
Fill in the blank: ________ clouds are dense, in patches, not increasing, or with tufts. No significant fire behavior expected.
Cirrus
Cumulus
Stratus
Nimbus
Match the following cloud types to their descriptions:
Rings or irritable bands across sky indicating jet stream location
Cirrus Streaks
Usually dense enough to block out sun or moon, can contain steady rain
Altostratus / Nimbostratus
Strong downdraft winds, rain, hail, lightning possible
Mature Thunderstorm
Altocumulus Castellatus clouds are often indicators of severe weather and thunderstorms.
True
False
Which cloud type is usually associated with fire weather instability and gusty winds?
A) Fair Weather Cumulus
B) Mature Thunderstorm
C) Altocumulus Castellatus
D) Stratus
Fill in the blank: ________ clouds are formed by strong winds, running fire, and are a concern for fire weather.
Wave Clouds (AGLS)
Cumulus Clouds
Stratus Clouds
Cirrus Clouds
Which special case is described as 'Rapidly rotating column of air, often visible as a funnel'?
Fire Whirl
Tornado
Virga
Brief Cloud
Fill in the blank: ________ is rain or snow that evaporates before reaching the ground, often associated with dry fire behavior.
Virga
Graupel
Sleet
Drizzle
Smoke layers mimic clouds in modifying the fire environment by changing: _________.
Atmospheric Stability
Wind Speed
Soil Moisture
Vegetation Type
Smoke layers mimic clouds in modifying the fire environment by changing: _________.
Fire Behavior
Soil Composition
Water Table Levels
Animal Migration Patterns
Clouds or smoke columns that grow vertically indicate a(n) ______ atmosphere.
unstable
stable
humid
cold
A smoke column that spreads out after limited rise indicates a(n) ______ atmosphere.
stable
unstable
humid
dry
Fill in the blanks. 1. Wind direction is the direction ________ which the wind is blowing.
from
to
by
with
Fill in the blanks. General wind is a ________ scale wind associated with high and low pressure.
large
small
medium
local
Local wind is a ________ scale wind.
small
large
medium
global
Fill in the blanks. 4. (True or False). Wind is the most critical factor affecting fire behavior.
True
False
The direction of the fire spread and smoke transport are mostly determined by _______________.
direction of wind
temperature of the fire
type of vegetation
humidity level
