The basic idea of ________ is that the Earth's surface is divided into a few large plates that move slowly relative to one another.
A. mantle plumes
B. isostasy
C. sea floor spreading
D. continental drift
E. plate tectonics
Answer: E
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A) passive continental margins B) zones of rapid seafloor spreading C) the edges of the deep sea trenches D) the margins of the Hawai'ian chain
How many ketones have the molecular formula C5H10O?
A) 1 B) 2 C) 3 D) 4
Which of the following is closely associated with the smell of rotting fish?
A) NH3 B) CH3NH2 C) (CH3)2NH D) (CH3)3N
Dust storms ____
a. ?are only a concern in areas near deserts b. ?affect vegetation and agriculture, but have little direct effect on humans c. ?can cause effects on a global scale d. ?are always caused by weather patterns and are not affected by human activity e. ?are prevented by agricultural planting in sensitive areas