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30 Cards in this Set
- Front
- Back
The primary source of energy for the earth's atmosphere is |
The sun |
|
In a volume of air near the earth's surface, ____ occupies 78 % and ____ nearly 21% |
Nitrogen, Oxygen |
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Which of the following is considered a variable gas in the earth's atmosphere |
water vapor |
|
Water vapor |
is invisible |
|
typically, water vapor occupies about what percentage of the air's volume near the earth's surface? |
less than 4% |
|
The only substance near the earth's surface that is found naturally in the environment in the atmosphere is a solid, liquid and a gas is |
water |
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Since the turn of this century, CO2 in the atmosphere has |
been increasing in concentration |
|
the primary source of oxygen for the earth's atmosphere during the past half billion years or so appears to be |
photosynthesis |
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___ holds a planet's atmosphere close to its surface. |
Gravity |
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Much of Tibet lies at altitudes over 18,000 feet where the pressure is about 500 mb. At such altitudes, the Tibetans are above roughly |
50% of the air molecules in the atmosphere |
|
The unit of pressure most commonly found on a surface weather map is |
millibars or hectopascals |
|
The planet with a strong greenhouse effect, whose surface temperature averages 480 degrees Celcius (or 900 Farenheit) is |
Venus |
|
The earth's atmosphere is divided into layers based on the vertical profile of |
air temperature |
|
Almost all of the earth's weather occurs in the |
troposphere |
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The most abundant gas in the stratosphere is |
Nitrogen (N2) |
|
In a temperature inversion |
air temperature decreases with increasing height. |
|
The rate at which temperature decreases altitude is known as the |
lapse rate. |
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Most of the ionosphere is found in what atmospheric layer |
thermosphere |
|
What altitude belt best describes the middle latitudes? |
30 to 50 degrees |
|
The word "weather" is defined as |
the condition of the atmosphere at a particular time and place. |
|
the middle latitudes of the Northern Hemisphere, surface winds tend to blow ___ and ___ around an area of surface low pressure. |
counterclockwise; inward |
|
The difference in altitude (i.e. the thickness) is greatest in the layer bounded by |
1 mb and 10 mb |
|
Which of the following is MOST likely associated with fair weather? |
high pressure area |
|
Which relates to weather rather than climate? |
Outside it is cloudy and snowing |
|
At the 500 mb level, the amount of oxygen inhaled in a single breath is ___ of that inhaled at sea-level |
about 1/2 |
|
The ozone hole is an actual hole int he atmosphere, a region of complete vacuum |
False |
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Ozone in the stratosphere |
protects life from harmful ultraviolet radiation |
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If you were to take a breath of pure oxygen, you'd be getting about ___ the amount of oxygen you'd get by taking a normal breath of our atmosphere. |
5x |
|
Standing at the top of a tall mountain, a breath of air would contain a lot fewer molecules than a breath of air taken at sea level. But the proportion of oxygen in the two breaths of air, relative to the other constituents, would remain the same. |
True |
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There is a lot of mixing and overturning of air in which of the following atmosphere layers |
troposphere |