North America and Europe account for nearly three-fourths of the world's
A) oil production.
B) energy consumption.
C) population.
D) coal production.
Answer: B
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How much did the concentration of CO2 (ppm) in the atmosphere increase from 1960 to 2010?
A. 75 ppm B. 25 ppm C. 40 ppm D. 105 ppm
What is the source of acid rain?
A. All rain is acid rain because rain has a hydronium ion concentration greater than 10-7 M. B. All rain is acid rain because rain has a pH is less than 7. C. Rain is normally basic, but depending on the weather it can get slightly acidic. D. Acid rain is from dissolved carbon dioxide. E. none of the above
It is impossible for a shark to drown
Indicate whether the statement is true or false
When is the dormant season for most plants in the temperate zone?
A) late fall B) winter C) spring D) fall E) summer