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| As altitude increases, density decreases. |
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Definition
| 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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Definition
| How much of the atmosphere's mass is in the lowest 20 miles? |
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Definition
| This gas makes up 78 percent of the atmosphere. |
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Definition
| This gas makes up 21 percent of the atmosphere. |
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Definition
| 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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Definition
| This type of radiation, from the sun, warms the ground. |
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Definition
| Cold air becomes warmer when it contacts the Earth’s surface. This is a process called |
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Definition
| Warm air rises, cools, becomes denser, and sinks again. This is a process called |
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Definition
| This is the layer of the atmosphere where meteors usually burn up. |
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Term
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Definition
| This is the layer of the atmosphere that is the highest and the hottest. |
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Definition
| This is the layer of the atmosphere that contains all the Earth’s weather. |
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Definition
| This is the layer of the atmosphere where the ozone layer is located. |
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Term
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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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Term
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Definition
| This type of radiation warms the objects that absorb it. |
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Term
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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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Term
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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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Term
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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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Term
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Definition
| Smoke, dust, sea salt, and pollen are all forms of _____________________ pollution. |
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Term
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Definition
| These are fuels formed from the remains of prehistoric plants and animals. Examples are coal, oil, gasoline, and natural gas. |
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Term
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Definition
T or F
Exposure to gas pollution in the air can cause health problems such as eye, nose and throat irritation, lung disease and asthma. |
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Term
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Definition
T or F
Particulate pollution in the air can damage buildings and crops and darken skies. |
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Term
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Definition
T or F
Rain clears the air, but it moves pollutants from the atmosphere to lakes, rivers, streams, oceans, and the ground. |
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Term
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Definition
| This action, by the Federal Government, was passed in 1970 and is intended to limit air pollution coming from factories, power plants, and car exhaust systems. |
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Term
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Definition
Which of the following is NOT a source of greenhouse gases?
a. Burning fossil fuels in factories
b. Bacteria in rice fields
c. Nuclear power plants
d. Livestock (cows and farm animals) |
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Term
| Solar, wind, hydroelectric, geothermal |
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Definition
| Give some examples of clean, alternative energy sources. |
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Term
| People decided to stop using ozone-eating chemicals. |
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Definition
| n the 1980's scientists discovered a hole in the ozone layer. In 1987, many countries around the world signed the Montreal Protocol. Since then, the ozone layer has slowly been repairing itself. Why? |
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Term
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Definition
| Nitrogen oxides + sunlight = ___________ |
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