Chapter 18 Study Quiz

Which of these instruments is not used to measure air pressure?

• anemometer

• aneroid barometer

• barograph

• mercurial barometer

An altimeter is an adaptation of the ________.

• barograph

• aneroid barometer

• anemometer

• mercurial barometer

The force that generates wind is _______.

• centrifugal force

• gravity force

• pressure gradient force

• Coriolis force

Isobars are lines on a weather map representing what?

• lines of equal air pressure

• lines of equivalent air speed

• lines showing equal density of bars

• lines of equal elevation for the tropopause

Closely spaced isobars indicate ________.

• high pressure gradient and high winds

• geostrophic conditions

• high pressure gradient and likely gusty winds

• low pressure gradient and weak gusty winds

A steep pressure gradient ________

• produces light winds

• is only possible in the tropics

• would be depicted by widely spaced isobars

• produces strong winds

Widely spaced isobars often indicate ________.

• variable winds

• light winds

• cyclonic winds

• high winds

The Coriolis effect influences ________.

• only wind direction

• only wind speed

• both wind speed and wind direction

• neither wind speed nor wind direction

Upper air winds ________.

• are unaffected by the Coriolis force

• are greatly influenced by friction

• are generally faster than surface winds

Low air pressure systems are usually associated with ________.

• clear weather

• diverging surface winds and low pressure aloft

• descending air and low pressure aloft

• converging air, precipitation, and high pressure aloft