Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
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1.
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The two most abundant gases in the atmosphere are
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a.
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carbon dioxide and oxygen.
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c.
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nitrogen and oxygen.
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b.
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carbon dioxide and nitrogen.
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d.
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nitrogen and hydrogen.
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2.
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Earth's atmosphere contains about four times as much nitrogen as
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a.
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carbon dioxide.
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b.
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oxygen.
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c.
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hydrogen.
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d.
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helium.
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3.
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Water vapor is water in the form of
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a.
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steam.
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b.
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crystals.
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c.
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a gas.
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d.
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droplets.
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4.
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In addition to gases, air also contains
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a.
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water vapor.
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b.
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ozone.
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c.
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particles.
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d.
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carbon dioxide.
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5.
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Density can be determined using
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a.
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Density = Mass/Volume.
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c.
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Density = Mass ´ Volume.
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b.
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Density = Volume/Mass.
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d.
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Density = Mass + Volume.
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6.
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Air in the atmosphere has pressure because
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a.
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the stratosphere is thick.
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c.
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wind moves the air.
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b.
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air has mass.
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d.
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temperature warms the air.
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7.
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The less mass in a given volume of air, the
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a.
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more the air weighs.
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b.
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greater the air pressure.
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c.
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more dense the air.
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d.
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less dense the air.
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8.
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The air pressure acting on the roof of your house
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a.
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comes from the air within a few feet of your rooftop.
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b.
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is greater on top of the roof than below it.
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c.
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comes from the air above and below your roof.
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d.
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is greater underneath your roof than on top of it.
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9.
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The National Weather Service measures air pressure in units called
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a.
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aneroids.
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b.
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barometers.
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c.
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millibars.
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d.
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pressure bars.
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10.
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Instruments used to measure air pressure are called
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a.
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thermometers.
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b.
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hygrometers.
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c.
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hydrometers.
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d.
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barometers.
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11.
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As you rise farther in the atmosphere, air pressure
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a.
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increases.
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b.
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decreases.
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c.
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doesn't change.
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d.
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first increases, then decreases.
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12.
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The ozone layer in the stratosphere absorbs
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a.
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visible light.
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b.
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infrared rays.
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c.
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ultraviolet radiation.
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d.
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carbon dioxide.
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13.
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The freezing point of pure water on the Celsius scale is
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a.
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0°C.
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b.
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32°C.
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c.
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100°C.
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d.
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212°C.
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14.
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Moisture will form faster on a glass when
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a.
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the air is dry and the glass is cold.
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c.
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the air is dry and the glass is warm.
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b.
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the air is humid and the glass is cold.
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d.
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the air is humid and the glass is warm.
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15.
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The weight of a column of air pushing down on an area is called ...
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a.
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density
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b.
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air pressue
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c.
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altitude
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d.
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kilograms
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16.
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If you carried a barometer down a mine shaft air pressure would ...
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a.
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decrease.
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b.
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stay the same.
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c.
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increase.
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d.
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double.
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17.
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What percentage of our atmosphere is oxygen?
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a.
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18%
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b.
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19%
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c.
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20%
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d.
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21%
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18.
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What percentage of our atmosphere is nitrogen?
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a.
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74%
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b.
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76%
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c.
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78%
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d.
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80%
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19.
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Of Neon, Helium, Hydrogen, Methane, ... which one is found in the SMALLEST quantity in our atmosphere?
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a.
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Neon
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b.
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Helium
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c.
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Methane
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d.
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Hydrogen
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20.
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Satellites orbit in which layer of the atmosphere?
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a.
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Troposphere
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b.
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Stratosphere
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c.
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Ionosphere
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d.
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Exosphere
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21.
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Rain, snow, storms, and most clouds occur in the ...
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a.
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Exosphere
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b.
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Ionosphere
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c.
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Stratosphere
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d.
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Troposphere
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22.
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The ozone layer absorbs ultraviolet radiation in this layer...
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a.
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stratosphere
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b.
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troposphere
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c.
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mesosphere
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d.
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thermosphere
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23.
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Meteroids burn up in the ...
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a.
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troposphere.
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b.
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stratosphere.
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c.
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mesosphere.
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d.
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thermosphere.
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24.
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London-type smog in 1905 was a combination of water droplets and ....
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a.
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car exhaust.
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b.
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soot.
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c.
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industrial pollution.
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d.
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dust.
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25.
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Most air pollution is caused by ...
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a.
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ozone.
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c.
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photochemical smog.
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b.
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acid rain.
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d.
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the burning of fossil fuels.
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26.
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For clouds to form, air needs to contain water vapor and ...
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a.
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nitrogen
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c.
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particles of dust or pollution
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b.
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oxygen
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d.
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carbon dioxide
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True/False
Indicate whether the sentence or statement is true or false.
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27.
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The atmosphere is a thin layer of gases that surrounds the earth.
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28.
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Nitrogen, oxygen, carbon dioxide, and helium are the 4 most common gases.
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29.
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As altitude increases, air pressure increases.
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30.
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As altitude increases density decreases.
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31.
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Earths weather is the thin layer of gases that surrounds Earth.
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32.
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Dry air is 70% nitrogen and 29% carbon dioxide.
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33.
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The density of a fixed volume of air increases as its mass increases.
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34.
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As air pressure increases, the column of mercury in a barometer rises.
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35.
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People live in the thermosphere, the inner layer of the atmosphere.
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36.
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Water vapor in the atmosphere that condenses and falls to Earth is measured with a psychrometer.
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37.
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25 inches of mercury would yield 846.75 millibars.
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38.
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One inch of mercury is approximately 32.53 millibars.
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39.
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In an aneroid barometer changes in air pressure cause the walls of the airtight metal chamber ot flex in and out. The needle on on the dial indicates air pressure.
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