Humidity, evaporation and relative humidity

Define humidity?

• The moisture in the atmosphere

• Amount of water vapor present in the air at a given temperature

• The percentage of water vapor to the water vapor capacity of the atmosphere

• The rate at which water vapor changes to liquid in the atmosphere.

On a cold day, water vapor capacity is higher than on a hot day.

• True

• False

Relative humidity is expressed in what unit?

• Cubic metre

• Metre per litre

• Percent

• Gallons

A psychrometer is used to measure - - - - -

• Evaporation

• Boiling point

• Relative humidity

• Dew point

Regions with - - - - temperature have higher relative humidity while regions with warmer temperature have - - - - - relative humidity

• Cooler/lower

• Higher /warmer

Regions with - - - - temperature have higher relative humidity while regions with warmer temperature have - - - - - relative humidity

• Cooler/lower

• Higher /warmer

Factors that affect evaporation is /are

• Sunlight

• Wind speed

• Humidity

• Surface area

At what temperature does evaporation take place?

• Freezing point

• Above melting point

• Below boiling point

• At heating point

Evaporation occurs at the surface while boiling takes place all through a liquid

• True

• False

Fog is precipitation formed at dew point but smaller than raindrops.

• True

• False

• Somewhat true

• Somewhat false