Less than 20% of the named glaciers at Glacier National Park in the U.S. still existed in 2010 compared to the number in 1850.
Answer the following statement true (T) or false (F)
True
In 1850, there were 150 named glaciers; in 2010 there were 25. (25/150) *100 = 16.7%
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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
Ethanol as a fuel is produced through the fermentation of
A. sugarcane. B. corn. C. sugar beets. D. All of these are correct.
Deserts and steppes occur at middle latitudes because of ________
A) rising air currents B) high temperatures C) subsiding air currents D) mountains that block the moisture and long distances from the oceans
Judge the following sentence according to the criteria given below: The melting of Arctic sea ice by rising temperatures is an example of a negative-feedback loop BECAUSE the lack of ice cover will result in the Arctic Ocean absorbing more of the Sun's radiation. A) The assertion and the reason are both correct, and the reason is valid
B) The assertion and the reason are both correct, but the reason is invalid.
C) The assertion is correct, but the reason is incorrect.
D) The assertion is incorrect. but the reason is correct.
E) Both the assertion and the reason are incorrect.