What three physiographic subregions make up the Intermontane West in the United States and Canada?
What will be an ideal response?
Great Columbia Plain in eastern Washington scoured by outwash from the massive Missoula Floods in Pleistocene times.
The Colorado Plateau in the southeast where a series of step-like plateaus turn into high mountains.
The Great Basin
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Anticyclones generally bring clear skies and calm conditions because
A) a strong polar front keeps cold air well to the north. B) adiabatic cooling prevents condensation and latent heat release. C) adiabatic warming prevents condensation and latent heat release. D) adiabatic warming promotes condensation and latent heat release.
The majority of divergent plate boundaries are associated with oceanic ridges
Indicate whether this statement is true or false.
Cobalt-60 is a radioactive isotope sometimes used in the treatment of cancer. Which of the following statements is true about an atom of cobalt-60?
A) It contains 27 neutrons. B) It contains 27 protons. C) It contains 60 neutrons. D) It contains 60 protons.
Which of the following is correct regarding Alfred Wegener's hypothesis of continental drift?
A) He posited that 220 million years ago all the continents were joined together to form the supercontinent Pangaea. B) It was immediately adopted because of his geological background. C) Though it was later shown to be quackery, it nonetheless spurred innovations in scientific research. D) It was based largely on conjecture with little basis in observable evidence. E) Although he provided a mechanism for continental drift, he could not find evidence of it.