Why would a decrease in the amount of ozone in the atmosphere increase the likelihood of people getting sunburn?
a. Global temperatures would rise
b. More ultraviolet radiation would reach the ground
c. People would be exposed to more infrared radiation
d. The premise is incorrect. Ozone and sunburn are not related
B
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Mercury's major atmospheric gas is
a. oxygen. b. hydrogen. c. carbon dioxide. d. Misleading; the atmosphere is virtually nonexistent.
In order to predict whether a star will eventually fuse oxygen into a heavier element, what do you need to know about the star?
A) its luminosity B) its overall abundance of elements heavier than helium C) how much oxygen it now has in its core D) its mass
Small deviations in a planet's orbital motion
A) indicate the presence of an extensive atmosphere. B) imply the nearby presence of a massive body. C) indicate the presence of a powerful magnetic field. D) show the planet's orbit isn't stable. E) show we don't fully understand gravitational forces yet.
The Surface Weather map presents data and analysis for what time of day?