1) Why doesn't the weight of air pushing down on our bodies make us collapse? a) Bones are stronger than air pressure. b) because air is pushing equally in all directions on the body. 2) What happens when the mercury in the barometer rises? a) there has been an increase in air pressure b) there has been a decrease in air pressure 3) What is the initial effect of an El Niño? a) warm waters replace cold waters b) cold nutrient-rich offshore waters are replaced by warm equatorial waters. 4) How often does an el Niño event occur?  a) about every 3-7 years b) every 10 years 5) What is an instrument used to measure wind speed? a) wind vane b) anemometer 6) Weather in the United States is moved by the westerlies in a(n) a) west to east direction across the continent. b) east to west direction across the continent 7) What causes local winds? a) topographical features b) surface composition c) the Coriolis effect d) precipitation 8) The main source for most wind is a) storms b) solar energy 9) Wind is caused by pressure differences. What causes that difference? a) solar radiation b) friction 10) The pressure differences that make wind happen are caused by: a) unequal heating of Earth's surface b) accumulation of clouds in different areas 11) Pressure decreases from the outer isobars toward the center in a) anticyclones b) cyclones c) polar fronts 12) The atmosphere balances the unequal heating of Earth's surface by moving a) cool air toward high latitudes and warm air toward the equator b) cool air toward the east and warm air toward the west c) warm air toward the east and cool air toward the west d) warm air toward high latitudes and cool air toward the equator 13) Because of the Coriolis effect, wind in the Northern Hemisphere  a) is deflected to the left b) rises higher into the atmosphere c) is deflected to the right d) sinks lower into the atmosphere 14) The net inward movement of air in a surface low-pressure system that causes the air mass to shrink is called a) horizontal convergence b) horizontal divergence c) surface convergence d) surface divergence 15) What are the most prominent features of airflow above the friction layer? a) vertically moving winds b) right-deflected winds c) left-deflected winds d) jet streams 16) The effect of friction on the net flow of air around cyclones is that it causes air to flow a) inward in either hemisphere b) outward in either hemisphere c) inward in the Norther Hemisphere d) Outward in the Southern Hemisphere 17) On a weather map, what do isobars placed very close together indicate? a) a steep pressure gradient and high winds b) a steep pressure gradient and weak winds 18) In the Northern Hemisphere, pressure gradients and the Coriolis effect applied to low-pressure centers produce winds that blow a) outward and counter clockwise b) inward and counter clockwise

Air Pressure and Wind test prep

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