Why do large, broad beaches have gradual slopes?
A) They have coarse particles.
B) There is a minimal transport of sediments back to the ocean.
C) They are not in equilibrium.
D) They have a large area for wave energy to dissipate.
D
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Although the polar regions radiate away more heat energy than they receive by insulation in the course of a year, what prevents them from becoming progressively colder each year?
A. circulation of heat by the atmosphere and oceans B. release of latent heat to the atmosphere when polar ice melts C. conduction of heat through the interior of the Earth D. concentration of Earth's magnetic field lines at the poles
People living in the Andes Mountains approximately 5,000 years ago domesticated ________
A) potatoes B) chickpeas C) barley D) corn E) wheat
Alaskans benefit from the trans-Alaska pipeline because Alaska's state constitution requires approximately 25% of state revenues associated with the oil industry to be placed into a monetary fund called the Permanent Fund, which ________
A) pays for education of native Alaskans through scholarships B) is used for social infrastructure, such as hospitals, roads, and schools C) is used as a main source of funds to reduce environmental damage D) is divided equally among the politicians in the state for running their offices E) pays yearly dividends to all Alaska residents
Chlorine in the stratosphere will turn ozone into ________
) smog B) oxygen (O2) C) chlorofluorocarbons D) air E) nitrogen