Exam 19: Moisture, Clouds, and Weather

Wind near the Earth's surface always flows from a region of high pressure toward a low-pressure region.

If one portion of the atmosphere becomes warmer than surrounding air:

Cool air can hold less water vapor than warm air.

Windward valleys receive much less moisture than leeward valleys.

When a warm air mass overtakes a cool one, the __________ air rises, leading to __________.

Moisture condenses from air when the air:

Once clouds start to form, rising air:

__________ clouds are fluffy clouds with flat bottoms and billowy tops.

A high-pressure region with outward spiraling surface wind is called a/an __________.

When a warm air mass overtakes a cold air mass, precipitation is widespread.

Which of the following statements about atmospheric humidity is correct?

If a large pressure difference occurs over a short distance:

Pressure gradients can change hourly.

When relative humidity reaches 100 percent, the air is:

Points of equal air pressure connected by weather map lines are called __________.

Rising air cools adiabatically.

During an adiabatic temperature change:

The rate at which air that is neither rising nor falling cools with elevation is called the __________ lapse rate.

If the dew point is below freezing, frost occurs.

A/an __________ is a seasonal wind caused by uneven heating and cooling of land and sea.