Lesson 15 Pre-Quiz

What are the characteristics of unstable air?

• Turbulence and good surface visibility.

• Turbulence and poor surface stability.

• Nimbostratus clouds and good surface visibility.

The most frequent of ground or surface-based temperature inversions is that which is produced by

• Terrestrial radiation on a clear, relatively still night.

• Warm air being lift rapidly aloft in the vicinity of mountainous terrain .

• The movement of colder air under warm air, or the movement of warm air over cold air.

What are the processes by which moisture is added to unsaturated air?

• Heating and condensation.

• Evaporation and sublimation.

• Supersaturation and evaporation.

The amount of water vapor which air can hold depends on the temperature of the air

• Dew Point

• Air Temperature

• Stability of the air.

What cloud types would indicate convective turbulence?

• Cirrus clouds.

• Nimbostratus clouds.

• Towering cumulus clouds.

In which situation is advection fog most likely to form?

• A warm, moist air mass on the windward side of mountains.

• An air mass moving inland from the coast in winter.

• A light breeze blowing colder air out to sea.

What would decrease the stability of an air mass?

• Warming from below.

• Cooling from below.

• Decrease in water vapor.

One weather phenomenon which will always occur when flying across a front is a change in the

• Wind direction.

• Type of precipitation.

• Stability of an air mass.