Over a one year period, how thick a layer in the oceans is subject to heating and cooling as the seasons change?
A) 15 - 100 meters
B) less than 6 meters
C) 10 centimeters
D) 200-600 meters
E) 1 meter
D
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In order to switch to sustainable agriculture, which of the following practices would not be favorable?
a. Give subsidies and tax breaks to those that use the method. b. Shift to full-cost pricing. c. Increase government support of research on sustainable agriculture. d. Expand the use of the crops of the green revolution. e. Discourage monocultures.
Describe the history of energy use in the United States over the past 200 years
What will be an ideal response?
Just eight natural elements make up over 98% of the Earth's crust by weight
Indicate whether the statement is true or false
Which of the following urban areas is not dependent upon the Colorado River as a water supply?
A) Las Vegas, NV B) Denver, CO C) Seattle, WA D) Albuquerque, NM E) San Diego, CA