S-290 2025
Rising air parcels always ______________ and _______________ - answer Expand
and Cool
Sinking air parcels always _____________ and _____________ - answer Compress
and Warm
What will happen to these factors in an air parcel when air pressure decreases?
- Volume
- Density
- Temperature - answerVolume will increase
Density will decrease
Temperature will decrease
What will happen to these factors in an air parcel when air pressure increases?
- Volume
- Density
- Temperature - answerVolume will decrease
Density will increase
Temperature will increase
When an air parcel rises or sinks without any loss of energy or mass is called
______________________ - answerAdiabatic Process
Stability is simply the resistance of the atmosphere to _______________ -
answerVertical Motion
Stability is better defined as the degree to which vertical motion in the atmosphere is
___________ or ____________ - answerEnhanced or Suppressed
What are the 3 types of stability - answer1) Unstable atmosphere
2) Stable atmosphere
3) Neutral atmosphere
Unstable atmospheres will enhance or suppress the vertical movement of air -
answerEnhance
Stable atmospheres will enhance or suppress the vertical movement of air -
answerSuppress
, T/F A neutral atmosphere will neither enhance nor suppress vertical movement of air -
answerTrue
An unstable atmosphere promotes the formation of _____________ - answerUpdrafts
3 Clouds that are associated with an unstable atmosphere - answer1) Cumulus
2) Cumulonimbus
3) Thunderstorm
Visibility in stable atmospheres tend to be Good or Poor? - answerPoor
Due to poor vertical mixing
This atmospheric condition is most often associated with critical or extreme wildland fire
behavior - answerUnstable
This atmospheric condition tends to suppress or reduce the growth or intensity of
wildland fire behavior - answerStable
For unstable conditions, the atmosphere can either be _____________ from below or
___________ from above - answerWarmed from below
Cooled from above
For stable conditions, the atmosphere can either be ____________ from below or
____________ from above - answerCooled from below
Warmed from above
Temperature Lapse Rate - answerChange in Temperature / Change in Altitude
The lowest 3000ft above the ground of the troposphere is called the
________________________ - answerBoundary Layer
Temperature normally _____________ with increasing altitude in the troposphere -
answerDecreases
Temperature sometimes increases with increasing altitude in the troposphere due to an
________________ - answerInversion
Negative vs Positive Lapse Rate - answerNegative lapse rate indicates the "normal"
decrease in temperature with altitude
Positive lapse rate indicates an "inverted" increase in temperature with altitude
The 3 Lapse Rates - answer1) Dry adiabatic
2) Wet adiabatic
3) Average
Rising air parcels always ______________ and _______________ - answer Expand
and Cool
Sinking air parcels always _____________ and _____________ - answer Compress
and Warm
What will happen to these factors in an air parcel when air pressure decreases?
- Volume
- Density
- Temperature - answerVolume will increase
Density will decrease
Temperature will decrease
What will happen to these factors in an air parcel when air pressure increases?
- Volume
- Density
- Temperature - answerVolume will decrease
Density will increase
Temperature will increase
When an air parcel rises or sinks without any loss of energy or mass is called
______________________ - answerAdiabatic Process
Stability is simply the resistance of the atmosphere to _______________ -
answerVertical Motion
Stability is better defined as the degree to which vertical motion in the atmosphere is
___________ or ____________ - answerEnhanced or Suppressed
What are the 3 types of stability - answer1) Unstable atmosphere
2) Stable atmosphere
3) Neutral atmosphere
Unstable atmospheres will enhance or suppress the vertical movement of air -
answerEnhance
Stable atmospheres will enhance or suppress the vertical movement of air -
answerSuppress
, T/F A neutral atmosphere will neither enhance nor suppress vertical movement of air -
answerTrue
An unstable atmosphere promotes the formation of _____________ - answerUpdrafts
3 Clouds that are associated with an unstable atmosphere - answer1) Cumulus
2) Cumulonimbus
3) Thunderstorm
Visibility in stable atmospheres tend to be Good or Poor? - answerPoor
Due to poor vertical mixing
This atmospheric condition is most often associated with critical or extreme wildland fire
behavior - answerUnstable
This atmospheric condition tends to suppress or reduce the growth or intensity of
wildland fire behavior - answerStable
For unstable conditions, the atmosphere can either be _____________ from below or
___________ from above - answerWarmed from below
Cooled from above
For stable conditions, the atmosphere can either be ____________ from below or
____________ from above - answerCooled from below
Warmed from above
Temperature Lapse Rate - answerChange in Temperature / Change in Altitude
The lowest 3000ft above the ground of the troposphere is called the
________________________ - answerBoundary Layer
Temperature normally _____________ with increasing altitude in the troposphere -
answerDecreases
Temperature sometimes increases with increasing altitude in the troposphere due to an
________________ - answerInversion
Negative vs Positive Lapse Rate - answerNegative lapse rate indicates the "normal"
decrease in temperature with altitude
Positive lapse rate indicates an "inverted" increase in temperature with altitude
The 3 Lapse Rates - answer1) Dry adiabatic
2) Wet adiabatic
3) Average
