Weather Flashcards
1
Q
When should terms height and altitude be used?
A
Height = elevation AGL
Altitude = elevation AMSL
2
Q
ISA:
Temp
Pressure
cooling lapse rate
1mb =
A
15°C
29.92” mercury / 1013.2mb
1.98°C per 1000’
27’
3
Q
What is Relative Humidity
A
A measure of how close a body of air is to the maximum amount of water vapour it is capable of holding.
Warmer the air the more water vapour it can hold
At 100% it is said to be saturated
4
Q
How does humidity affect air density
A
It decreases density because the mass of a molecule of water vapour is less than the average mass of gases that make up air.
5
Q
what is a dew point
A
the temperature to which the air must cool for it to become completely saturated with water
