Which gas in the upper atmosphere shields Earth's surface from the sun's harmful ultraviolet rays?
A) nitrogen
B) methane
C) ozone
D) chlorofluorocarbons
C
You might also like to view...
Which of the following is "virtually certain" (99% certainty) to occur according to the IPCC?
A) Northern hemisphere spring snow cover will decrease. B) Ocean wave heights of mid-latitude storms will increase. C) High latitude precipitation amounts will increase. D) Ocean acidification will increase as atmospheric CO2 accumulates. E) Frequency of high precipitation will increase.
Future supplies of natural gas are likely to be more abundant than oil reserves.
Answer the following statement true (T) or false (F)
The climate in which temperatures average 25?C or more each month and total precipitation for the year is high is the ________ climate.
A) marine west coast B) humid subtropics C) humid continental D) wet tropics E) highland.
Globally, some of the worst radioactive storage leaks have been associated with
A) military facilities in the United States and Russia. B) hospitals in Europe. C) nuclear power plants in China. D) university research facilities.