What percentage of the world's energy supplies is consumed by the U.S.?
a. 5%
b. 10%
c. 28%
d. 75%
e. 90%
C
Environmental & Atmospheric Sciences
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The image below shows a beam of radiation passing between two electrically charged plates. 
Which of the beams is due to alpha particles?
A. a B. b C. c D. all of the above E. none of the above
Environmental & Atmospheric Sciences
The first domesticated animals were probably
A) horses. B) cattle. C) dogs. D) sheep
Environmental & Atmospheric Sciences
Which of the following is NOT composed of calcium carbonate?
A. marble B. limestone C. calcite D. pyrite E. shells
Environmental & Atmospheric Sciences
A serious consequence of sea-level rise is contamination of _______________ by salt water
Fill in the blank with correct word.
Environmental & Atmospheric Sciences