GEOG 1112: Lecture 4
23 Cards in this Set
Front | Back |
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RED NOTE: In what layer were the shooting stars described?
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Mesosphere
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RED NOTE: In the troposphere, air behaves like ________.
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a fluid
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Uppermost layer
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Thermosphere
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Coldest layer
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Mesosphere
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Contains the ozone layer
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Stratosphere
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Auroras occur here
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Thermosphere
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Noctilucent clouds occur here
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Mesosphere
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Ionosphere occurs here
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Thermosphere and Mesosphere
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Temperatures rise sharply (up to 2200 degrees F)
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Thermosphere
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RED NOTE: UVB is the chief cause of _________________.
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sunburn, much skin cancer cataracts
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RED NOTE:
UVA rays cause ________________________.
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leathery, wrinkled, sagging skin
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RED NOTE: How many ozone molecules can one chlorine molecule destroy?
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Thousands and thousands
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RED NOTE: When will the ozone hole be back to “normal” (1980) levels?
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2070
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How many oxygen molecules does ozone have?
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3
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The ozone layer absorbs ______ of the UVC (ultraviolet C) rays
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100%
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The ozone layer absorbs ____ of the UVB (ultraviolet B) rays.
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90%
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Most of the ultraviolet rays that make it to the earth are __________.
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UVA (ultraviolet A rays).
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Until the 20th century, the ozone layer had been _________________.
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relatively stable
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Which was most responsible for thinning the ozone layer?
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CFC's
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The __________________ help make the ozone layer thinnest over the poles.
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polar vortex and polar stratospheric clouds
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The ozone layer is ____________________.
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thinning, particularly in the upper latitudes.
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The ____________ was adopted in 1987 banning CFCs
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Montreal Protocol
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Troposhere
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1. Lowest (closest to earth) layer of the atmosphere: the one where we live.
2. 90% of the total mass of the atmosphere: bulk of all water vapor, clouds, and air pollution.
3. The tropopause is the troposphere’s upper limit. Its height varies over time and place.
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