PPL Met - Moisture DONE

What are the two main states through which moisture changes?

• Deposition and Sublimation

• Condensation and Evaporation

• Condensation and Melting

• Freezing and Evaporation

What statement(s) is correct regarding latent heat?

• It does not change the temperature of the surrounding environment

• It affects the temperature of the substance

• It is the heat energy required or released when a substance changes state

• Heat required to raise temperature of substance by 1 degree

What is sublimation?

• Water to ice

• Ice to vapour

• Vapour to ice

• Vapour to water

What is melting and freezing?

• liquid to ice, ice to liquid

• Liquid to ice, ice to vapour

• Ice to liquid, liquid to ice

• Ice to liquid, liquid to vapour

What is it called when vapour changes to ice

• Sublimation

• Freezing

• Condensation

• Deposition

When there are not enough condensation nuclei, air may become...

• Fully sublimed

• Super saturated

• Super cooled

• Fully deposited

What is evaporation?

• vapour to liquid

• ice to vapour

• liquid to vapour

• liquid to ice

When is the rate of evaporation greatest: ____ temp, _____ relative humidity

• high, low

• high, high

• low, high

• low, low

What is the equation for relative humidity?

• absolute humidity / saturation content

• water / absolute humidity

• saturation content / absolute humidity

• temp / water

Define absolute humidity

• The temperature at which air becomes 100% saturated

• The total water content a parcel of air can hold

• How much water vapour is actually present

• Relative humidity of 50%