CFC's in the stratosphere ________.
a. provide protection from incoming solar radiation
b. dissipate within days
c. combine with NOX to produce smog
d. adsorb ultraviolet light from the sun
e. contribute to ozone destruction
Question 2
The apparent weight of a fish in an elevator is greatest when the elevator
a. moves downward at constant velocity.
b. moves upward at constant velocity.
c. accelerates downward. d. accelerates upward. e. is not moving.