1.2 Water in the Atmosphere

When air temperature increases, the amount of water vapor that the air can hold ____________________.

• increases

• decreases

• stays the same

The amount of water vapor in the air compared to the amount of water vapor that the air can hold at that temperature is what term?

• Dew Point Temperature

• Humidity

• Hydrology

• Relative Humidity

When air cools and reaches a relative humidity of 100%, the air is said to:

• be very dry

• be moving at a rapid rate of speed

• have no moisture in it

• have reached its dew point temperature

A condensation nuclei is important because:

• it lowers the dew point temperature so condensation can occur

• it gives water vapor a surface to condense on too

• it raises the air temperature

• it enables water molecules to evaporate at a faster rate

What term is used to indicate the process of liquid water turning into water vapor?

• Sublimation

• Condensation

• Evaporation

• Deposition

What term is used to indicate the process of water vapor turning into ice crystals?

• Sublimation

• Condensation

• Evaporation

• Deposition

What term is used to indicate the process of water vapor turning into liquid water?

• Sublimation

• Condensation

• Evaporation

• Deposition

If two air masses have a 50% relative humidity, but one is at 25 degrees Celsius and the other is at 10 degrees Celcius, then:

• the air mass at 25 degrees Celsius has less water vapor in it

• the air mass at 10 degrees Celsius has less water vapor in it

• they both have the same amount of water vapor in them

• relative humidity is not affected by air temperature in anyway, so this question has no validity

The Dry Adiabatic Lapse Rate is:

• the constant decrease of air temperature with altitude in the Troposphere through dry air at a rate of 100 C/1000 m

• the constant increase of air temperature with altitude in the Troposphere through dry air at a rate of 6 C/1000 m

• the rate at which a cloud will for on a dry day due to a change in solar radiation

• the rate at which water will evaporate dependent on the time of year and the humidity of the air

The Lifted Condensation Level (LCL) is:

• the temperature that air has to be cooled in order for condensation to occur

• the level of relative humidity in the air which has been lifted from the ground

• the amount of condensation that is produced during the formation of a cloud in our atmosphere

• the altitude in the troposphere that air is cool enough to have reached the dew point temperature for condensation or deposition to occur