In some thunderstorms, lightning is seen but thunder does not get produced by the lightning
a. True
b. False
ANSWER: False
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The world ocean covers what percentage of Earth's surface?
a. 1% b. 21% c. 51% d. 71% e. 91%
An erosional coast that has little tidal variation:a
can erode quickly because wave action is centralized. b. can erode slowly because there are no dramatic changes in tide. c. can erode quickly because it is inundated with large waves. d. can erode slowly because it becomes protected from large tidal variations.
In the 1989 Loma Prieta quake, the Marina District building collapses were extensive, and numerous destructive fires broke out, due to all but which one of the following?
A. Widespread looting and arson B. Amplified shaking C. Deformation and liquefaction of artificial-fill foundations D. Soft first-story construction that led to building collapses
How many unpaired electrons are there in an oxygen atom in its ground state?
A) 1 B) 2 C) 4 D) 8