WorksheetsMET - Clouds
Total questions: 38
Worksheet time: 20mins
What does super saturated mean?
air reaches 100% saturation without condensing
air reaches 100% saturation and condenses
relative humidity is approaching 100%
saturation content is more than absolute humidity
What is deposition?
ice to liquid
vapour to liquid
vapour to ice
ice to vapour
What is the likely cloud, turbulence, water droplets when air is stable?
Cumuliform, severe, large
Stratiform, severe, large
Cumuliform, light, small
Stratiform, light, small
What is the likely cloud, turbulence, water droplets when air is unstable?
cumuliform, light, large
cumuliform, strong, large
stratiform, strong, large
stratiform, light, small
What is convective rising?
When two air masses of different temperatures meet one is forced to rise
When the heating of earth's surface provides rising
When there's surface convergence as seen in a low pressure system causing air to rise
When air is forced to rise up a mountain
How does frontal lifting produce cloud?
Surface convergence causing air to rise
Heating of Earth's surface plus unstable air
Parcels of air at different temperatures meet and force one to rise
A front moving from ocean to land is heated and causes front to rise
What does cirro indicate?
Below 7,000ft
7,000-17,000ft
Above 17,000ft
Stable high cloud
What does alto indicate?
Below 7,000ft
7,000-17,000ft
Above 17,000ft
High moisture
What does nimbo indicate?
stable
unstable
high cloud
high moisture
Describe cirrus cloud.
Select all that apply
Middle layer clouds
High risk of icing
No turbulence
Comprises of ice crystals
Describe CS.
Select all that apply
Sun or moon appears to have halo when looking through this cloud
Moisture content is high
High level cloud
Icing no risk
Describe cirrocumulus cloud.
Select all that apply
Sun or moon appears to have halo when looking through this cloud
Resembles sheep’s wool
Written as CS
Icing no risk
Which is correct in regards to AC cloud?
Blue grey in colour
Appears as ripples
Icing nil to light above FZL
Precipitation heavy
What is virga?
Water that evaporates as it contacts the earths surface
Water that evaporates before it reaches the earths surface
The heaviest type of precipitation
Hail which is >5mm in size
Which is correct in regards to cumulus cloud?
Generally found on bad weather days
Icing moderate to severe
Precipitation heavy
Turbulence nil to light outside the developments
Which is correct in regards to CB cloud?
Similar to CC but includes an anvil cloud
The anvil cloud can be created due to upper level inversion
Turbulence rarely found
Rain light to moderate
How many OKTAs is SCT cloud?
0
1-2
3-4
2-3
What okta is FEW 3,500ft covering?
0
1-2
3-4
2-3
What is SKC cloud okta?
0
1-2
3-4
2-3
How is pyrocumulus cloud created?
air condensing after being forced to rise by mountains
cloud condensing above inversion where temperature reduces again
smoke rises and water condenses forming clouds
Earth's surface heats air, rises and condenses producing unstable CU cloud
What level of cloud has 5-7 oktas?
few
scattered
overcast
broken
FEW 1,500ft SCT 5,000ft BKN 6,500. What is the base?
1,500ft
5,000ft
6,500ft
Depends on OVC level
What is the principal factor of cloud dispersal?
Adiabatic warming
Adiabatic cooling
Warming through moving over warm surface
Warming through solar radiation
What is orographic rising?
When two air masses of different temperatures meet one is forced to rise
When the heating of earth's surface provides rising
When there's surface convergence as seen in a low pressure system causing air to rise
When air is forced to rise up a mountain
Clouds with a similar base contain _____ water in summer than winter
more
less
In mid-latitudes, what is the range of cloud base height above the Earth’s surface which will classify clouds as ‘middle cloud’?
Below 6,500 ft
Between 6,500 ft to 23,000ft
Between 4,500 ft to 23,000 ft
Between 10, 000 to 25, 000 ft
What type of cloud is the most likely to form if moist air is cooled adiabatically in an area with an ELR of 1°/1000’?
Cumuliform
Cumulonimbus
Stratiform
Orographic
What are the two main classifications of clouds?
Cirroform and Cumuliform
Stratiform and Cumuliform
Nimbus and Layered
Alto and Cumuliform
What are Cirriform cloud mainly composed of?
Ice crystals
Mixture of water droplets and Ice Crystals
Super-cooled water droplets
Water droplets
Temperature = 14°C
Dew point = 6°C
What height will LCL cloud form?
3200 ft
2670 ft
3720 ft
2200 ft
TRUE or FALSE?
"The water content of cloud is generally lower in summer than in winter"
TRUE
FALSE
Select the TRUE statements
The most common process of cloud dispersal is through adiabatic COOLING of the air through SUBSIDENCE
The most common process of cloud dispersal is through adiabatic WARMING of the air through SUBSIDENCE
The most common process of cloud dispersal is through adiabatic COOLING of the air through ASCENT
The most common process of cloud dispersal is through adiabatic COOLING of the air through ASCENT
What cloud is this a picture of?
Rotor streaming cloud
Mammatus cloud
Kelvin Helmholtz cloud
Asperitas cloud
What cloud is this a picture of?
Towering Cumulus (Tcu)
Cumulonimbus (Cb)
Pyrocumulus
Mammatus cloud
Kelvin Helmholtz wave cloud
What cloud is this a picture of?
Cirrus (Ci)
Cirrostratus (Cs)
Altocirrus (Ac)
Cirrocumulus (Cc)
Temperature = 20°C
Dew point = 5°C
What height will CCL cloud form?
5000 ft
5100 ft
4000 ft
5100 ft
What type of cloud is this?
Asperitas
Kelvin Helmholtz
Banner cloud
Cumulonimbus
Temperature = 22°C
Dew point = 8°C
What height will LCL cloud form?
4420ft
4500ft
4760ft
4670ft
