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