Atmospheric Science Quiz

Define low pressure:

• None of the above

• A trough

• An area of convergence

• An area with lower pressure than that of the environments.

Define high pressure:

• An area with higher pressure than that of the environments.

• A high pressure ridge

• An area of divergence

• Non of the above

Wind shear is experienced when:

• The wind has been forecasted to be light and variable.

• Neither wind direction nor force changes at altitude.

• There is a ground inversion and strong winds above the inversion layer.

• Gusts have been forecasted or reported.

As a parcel of air cools, its ability to hold water vapour:

As a parcel of air warms, its ability to hold water vapour:

What does dewpoint mean?

• The temperature to which a mass of air must be cooled in order to reach saturation.

• The temperature at which ice melts.

• The freezing level (danger of icing).

• The temperature at which the relative humidity and saturation vapour pressure are the same.

Which of the following types of clouds are evidence of unstable air conditions?

Which of the following clouds may extend into more than one layer?

• Altocumulus
• Stratus

• Nimbostratus

• Cirrus

Which cloud type may extend from low to high level (vertical development)?

Cumulus clouds are an indication for

• stability

• up and downdrafts

• the approach of a cold front

• the approach of a warm front