Potholes are especially common in areas with numerous freeze-thaw cycles.
a. true
b. false
a. true
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The kinetic energy of Earth when orbiting the Sun is greatest when
A. approaching the Sun. B. closest to the Sun. C. at its greatest distance from the Sun. D. receding from the Sun.
Judge the following sentence according to the criteria given below: In most places on Earth, high tides occur every 12 hours BECAUSE tides depend on the solar day
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.
In the United States, large areas of ________ are blanketed with a cover of loess.
A. the Rocky Mountains B. the Midwest C. Arizona and New Mexico D. Canada E. California
Which one of the following statements about polar bears is not true?
a. In 2008, the U.S. Fish and Wildlife Service placed the Alaskan polar bear on its list of threatened species. b. Alaskan state government officials are trying to have the polar bear delisted. c. Polar bear populations are a significant threat to wolf populations in Alaska d. Oil and coal industry leaders want the polar bear delisted in Alaska e. Less than 60% of the world population of polar bears lives in Alaska