The aurora borealis is best viewed
A. during a lunar eclipse.
B. during summer nighttime skies.
C. at the time of a full Moon.
D. from orbiting space stations.
Answer: D
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Tsunamis can be detected on the open ocean through
A) measurement of changes in pressure exerted on the sea bottom by the water column B) shipboard observations of wave heights C) seismometer records D) measurement of wave speeds with Doppler radar
As a strong hurricane moves ashore, which of the following causes the most devastating damage in the coastal zone?
A) lightning B) storm surge C) torrential rains D) strong winds
What percentage of the earth's water supply do the oceans represent?
What will be an ideal response?
Most igneous rocks are classified as either volcanic or plutonic based on their ____
A)size and location B)magnesium content C)iron content D)texture and composition E)size and composition