Chp 19,20, & 21 Air Pressure, Weather, and Climate

Which of the following is true about air pressure acting on an object?

• The amount pushing down on the object will gradually decrease with time.

• The amount pushing up on the object will gradually increase with time.

• There is more air pressure pushing up on the object than there is pushing down.

• There is just as much air pressure pushing up as there is pushing down on the object.

In a mercury barometer, when air pressure increases, the mercury in the tube

• rises.

• falls.

• rises, then falls.

• falls, then rises.

Which of the following is a difference between a mercury barometer and an aneroid barometer?

• The mercury barometer is smaller.

• The mercury barometer can provide a continuous record of pressure changes.

• The aneroid barometer does not use mercury to measure pressure changes.

• The aneroid barometer is not as portable.

What is the ultimate source of energy for most wind?

• air pressure

• solar radiation

• changes in humidity

• air temperature

The pressure differences that make wind happen are caused

• when water vapor in the air rises then falls.

• by a sudden drop in humidity.

• by the unequal heating of Earth's surface.

Pressure decreases from the outer isobars toward the center in

• cyclones

• anticyclones

• polar fronts

• jet streams

Because of the Coriolis effect, wind in the Northern Hemisphere

• is deflected to the left.

• rises higher into the atmosphere.

• is deflected to the right.

• sinks lower into the atmosphere.

What are the most prominent features of airflow above the friction layer?

• jet streams

• vertically moving winds

• right-deflected winds

• left-deflected winds

On a weather map, what do isobars placed close together indicate?

• a steep pressure gradient and high winds

• a steep pressure gradient and weak winds

• a weak pressure gradient and high winds

• no pressure gradient and therefore no wind

In the Northern Hemisphere, pressure gradients and the Coriolis effect applied to low-pressure centers produce winds that blow

• outward and clockwise.

• outward and counterclockwise.

• inward and clockwise.

• inward and counterclockwise.