Which of the following columns of the periodic table contains only gaseous elements?
A) 5A
B) 6A
C) 7A
D) 8A
D
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How long ago did the big bang catalyze the beginning of the universe?
A) 13.7 billion years ago B) 1.37 billion years ago C) 4 billion years ago D) 40 billion years ago
Rock may melt by ________.
A. raising its temperature B. lowering the pressure on it C. increasing its water content D. All of these choices are correct.
Strained geologic materials lose their original configuration during deformation
Indicate whether this statement is true or false.
A mountain or katabatic breeze is created when
A. air from lower elevations is heated more efficiently and rises, creating an upslope breeze. B. air from higher elevations is heated more efficiently and sinks, creating a downslope breeze. C. air from lower elevations is cooled more efficiently and rises, creating an upslope breeze. D. air from higher elevations is cooled more efficiently and sinks, creating a downslope breeze.