The first function of water vapor in the earth's original atmosphere was to:
A) create oxygen.
B) increase the amount of carbon dioxide in the atmosphere.
C) block the solar wind.
D) fall as rain and thus fill the oceans.
E) provide needed nourishment for primitive plants.
D
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Which of the following is categorized as a secondary pollutant?
a. carbon monoxide b. Ozone c. carbon dioxide d. sulfur dioxide e. Hydrocarbons
China and India together are about ________ percent of world population, but they have less than ________ percent of the world's renewable fresh water
A) 75; 21 B) 37; 29 C) 37; 9 D) 25; 4 E) 50; 9
The Chicxulub impact crater in the Yucatan is an easily recognizable crater
Indicate whether the statement is true or false
The Exclusive Economic Zones established by the 1982 Law of the Sea Treaty
A. could be claimed by more than one nation, which will result in appeals to the United Nations for conflict resolution. B. include up to 200 nautical miles of the continental shelf offshore of a country's border or further if that country's petition to the United Nations is approved. C. encompass, in different areas, such diverse resources as fish, placers and metal-rich muds. D. include all of the choices.