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| As altitude increases, density decreases. |
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| As altitude increases, what happens to the density of the air? |
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| Outer space is considered to begin this high above the Earth’s surface. |
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| How much of the atmosphere's mass is in the lowest 20 miles? |
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| This gas makes up 78 percent of the atmosphere. |
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| This gas makes up 21 percent of the atmosphere. |
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| When we breathe, we inhale oxygen and exhale carbon dioxide. Trees take in the carbon dioxide and release oxygen. What cycle is this an example of? |
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| This type of radiation, from the sun, warms the ground. |
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| Cold air becomes warmer when it contacts the Earth’s surface. This is a process called |
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| Warm air rises, cools, becomes denser, and sinks again. This is a process called |
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| This is the layer of the atmosphere where meteors usually burn up. |
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| This is the layer of the atmosphere that is the highest and the hottest. |
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| This is the layer of the atmosphere that contains all the Earth’s weather. |
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| This is the layer of the atmosphere where the ozone layer is located. |
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Definition
| These are the layers of the atmosphere where the temperature decreases as you go up. |
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Term
| D. destroys the ozone layer |
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Definition
Which of the following is not a characteristic of ultraviolet radiation?
A.can cause skin cancer B.can harm crops and other materials like paint
C.moves faster than the light we see.
D.destroys the ozone layer |
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Definition
| This type of radiation warms the objects that absorb it. |
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Definition
| Gases in the atmosphere absorb and trap infrared radiation. This helps to keep energy in the Earth system for a while. This is called the |
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Definition
Which of the following is not a greenhouse gas?
A.carbon dioxide
B.nitrogen
C.methane D.water vapor |
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Definition
| If there were no greenhouse effect, then the average temperature of the Earth would be ________ degrees Fahrenheit. |
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Term
| B. it is in the troposphere. |
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Definition
Ozone gas (O3) is only a pollutant when
A. it is in the stratosphere.
B. it is in the troposphere.
C. it is in the mesosphere.
D. it is in the thermosphere. |
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