* not completed

. What is saturation vapour pressure?

The vapour pressure when evaporation equals condensation correct incorrect

The pressure contributed by a single gas in a mixture of gases correct incorrect

The partial pressure exerted by water vapour correct incorrect

The maximum amount of water vapour that can exist at a given temperature correct incorrect

* not completed

. Which of the following statements about saturation vapour pressure is false?

It is the maximum vapour pressure that can exist at a given temperature. correct incorrect

It depends on atmospheric pressure. correct incorrect

It increases with increasing temperature. correct incorrect

It is the vapour pressure when evaporation equals condensation. correct incorrect

* not completed

. Which of the following is an absolute measure of atmospheric water vapour?

Dew-point temperature correct incorrect

Relative humidity correct incorrect

Dew-point depression correct incorrect

Vapour pressure deficit correct incorrect

* not completed

. Which of the following absolute measures is conserved in vertical motion?

Vapour pressure correct incorrect

Absolute humidity correct incorrect

Mixing ratio correct incorrect

Dew-point temperature correct incorrect

* not completed

. What is specific humidity?

The ratio of the mass of water vapour to the mass of dry air. correct incorrect

The mass of water vapour in a unit volume of air correct incorrect

The ratio of the amount of water vapour in the air to the saturation value at the air's temperature correct incorrect

The ratio of the mass of water vapour to the total mass of air correct incorrect

* not completed

. When relative humidity reaches 100 per cent, what has happened to air temperature and dew-point temperature?

Air temperature is higher than dew-point temperature. correct incorrect

Dew-point temperature is higher than air temperature. correct incorrect

Air temperature and dew-point temperature are the same. correct incorrect

There is no relationship between relative humidity and temperature. correct incorrect

* not completed

. At what time of day is the relative humidity typically highest?

Overnight correct incorrect

Early afternoon correct incorrect

Late afternoon correct incorrect

Evening correct incorrect

* not completed

. Which of the following would lead to a decrease in relative humidity?

A decrease in vapour pressure correct incorrect

A decrease in saturation vapour pressure correct incorrect

A decrease in temperature correct incorrect

An increase in dew-point temperature correct incorrect

* not completed

. A psychrometer is an instrument that measures the amount of water vapour in the air based on what?

How hair lengthens in humid conditions correct incorrect

The relationship between changes in electrical resistance and relative humidity correct incorrect

A measurement of the dew-point temperature correct incorrect

The cooling produced by evaporation correct incorrect

* not completed

. What measure do some scientists believe should be used instead of the humidex since it provides a more straightforward measure of human comfort?

Heat index correct incorrect

Wind chill correct incorrect

Dry-bulb temperature correct incorrect

Dew-point temperature correct incorrect

* not completed

. When the condensation rate is greater than the evaporation rate, liquid water decreases.

TRUE correct incorrect

FALSE correct incorrect

* not completed

. Evaporation can depend on the turbulence in the atmosphere.

TRUE correct incorrect

FALSE correct incorrect

* not completed

. Relative humidity depends on the water vapour content of the air and the air temperature.

TRUE correct incorrect

FALSE correct incorrect

* not completed

. An increase in temperature will decrease the vapour pressure deficit.

TRUE correct incorrect

FALSE correct incorrect

* not completed

. A large depression of the wet bulb is representative of very dry air.

TRUE correct incorrect

FALSE correct incorrect