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28 Cards in this Set
- Front
- Back
the mass of air surrounding a planet
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atmosphere
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Facts about the atmosphere
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it presses down on the earth and all its inhabitants, air has mass so it is like weight on our shoulders
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the pressure exerted by the atmosphere on all objects within it
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atmospheric pressure
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an instrument used to measure atmospheric pressure
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barometer
(most do not use water,typically they use mercury) |
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should atmospheric pressure increase or decrease as altitude increases?
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In general atmospheric pressure decreased with increasing altitude. Think of atm. pressure as the weight of air pressing down on what it touches. As you increase alt., there is less air above you. As a result, there is less weight pressing down on you.
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The atmospheric pressure is 1.1 atm. Which of the following values for atmospheric pressure would you see in the weather report 29.9 inches, 32.9 inches, or 28.1 inches?
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32.9 in. Remember, an atmospheric pressure of 1.0 atm means that atmospheric pressure is at its average sea-level value, which is the same as 29.9 in. of mercury. Since the atm. pressure is 1.1 atm., we know that it must be higher that its average sea-level value. The only number given that is greater than 29.9 in of mercury is 32.9 inches of mercury.
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what are the two general layers the atmosphere are divided into
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the homosphere and heterosphere
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the lower layer of earth's atmosphere, which exists from ground level to roughly 80 km (50 miles) above sea level
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homosphere
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the prefix "homo" means
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same
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The atmospheric pressure is 1.1 atm. Which of the following values for atmospheric pressure would you see in the weather report 29.9 inches, 32.9 inches, or 28.1 inches?
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32.9 in. Remember, an atmospheric pressure of 1.0 atm means that atmospheric pressure is at its average sea-level value, which is the same as 29.9 in. of mercury. Since the atm. pressure is 1.1 atm., we know that it must be higher that its average sea-level value. The only number given that is greater than 29.9 in of mercury is 32.9 inches of mercury.
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what are the two general layers the atmosphere are divided into
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the homosphere and heterosphere
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the lower layer of earth's atmosphere, which exists from ground level to roughly 80 km (50 miles) above sea level
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homosphere
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the upper layer of earth's atmosphere, which exists higher than roughly 80 km (50 miles) above sea level
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heterosphere
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the prefix "homo" means
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same
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the air in the homosphere is made up of what gases
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78% nitrogen, 21% oxygen, and 1% many other gases. The amount of air in the homosphere does change, however but it is always in those %.It is just "thinner"
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the prefix "hetero" means
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different
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is milk heterogeneous or homogeneous
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homogeneous
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is Italian salad dressing heterogeneous or homogeneous?
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heterogeneous
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the three regions of the homosphere
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troposphere,stratosphere,mesosphere
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region of the atmosphere that extends from ground level to roughly 11 km (7 miles) above sea level.
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troposphere
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region of the atmosphere that spans altitudes of roughly 11 km to 48 km (30 miles)
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stratosphere
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region of the atmosphere that spans altitudes of roughly 48 km to 80 km (50 miles)
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mesosphere
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the boundary between the troposphere and the stratosphere
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tropopause
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the boundary between the stratosphere and the mesosphere
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mesopause
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differences between stratosphere and troposphere and mesosphere
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air is thinner in stratosphereand even thinner in mesosphere
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this is called the "weather layer" that cantains almost all the clouds, rain, snow, storms, etc
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the troposphere. the vast majority of earth's air supply exists in this region.
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in general for every km you increase in altitude, the temperature decreases by about 6.4 degrees Celsius. (gradient means gradual). this effect is called what?
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temperature gradient
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narrow bands of high-speed winds that circle the earth, blowing from west to east
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jet streams-- they can blow up to 250mph
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