Typically, water vapor occupies about what percentage of the air's volume near Earth's surface?
a. ?about 78 percent
b. ?about 21 percent
c. ?close to 10 percent
d. ?less than 4 percent
e. ?less than 1 percent
ANSWER: d
You might also like to view...
Most ecologists now recognize that mature, late-successional ecosystems ____.
A. are in a state of continual disturbance and change B. are in a stable state of equilibrium C. are in natural balance with their environment D. have followed an expected path to their stable state as a climax community E. have inevitably progressed through succession and no longer face competition
What is a geoportal?
What will be an ideal response?
____________________ zones are characterized by warm, dry, descending air
Fill in the blank(s) with correct word
Cap-and-trade is a system that ________
A) has been repealed by Congress as useless in diminishing pollution B) allows industries that pollute at levels below the federal cap to sell their extra permits to industries that pollute at levels above the cap C) specifies a certain cap on industrial pollutants that can be traded to other nations D) rapidly brings pollution emissions to near zero for participating industries E) allows industries to set their own levels for pollution emission so trading can continue