The hypothesis of continental drift was not widely accepted because
A) the hypothesis required that the entire Earth was once frozen.
B) the hypothesis required long, narrow land bridges that did not exist.
C) there was no mechanism to move continents through the oceanic crust.
D) All of these were reasons the hypothesis was not widely accepted.
C) there was no mechanism to move continents through the oceanic crust.
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Equatorial upwelling occurs worldwide, but where is it most pronounced?
a. Atlantic Ocean b. Southern Ocean c. Indian Ocean d. Pacific Ocean e. Arctic Ocean
During winter, ________ air masses are associated with poor air quality in urban areas because cold conditions lead to increased consumption of heating fuel
A) cP B) cT C) mP D) mT
Which of the following is an example of a mid-ocean ridge?
A) Puerto-Rico Trench B) Challenger Deep C) Mid-Indian Ridge D) East Pacific Rise
Which of the following is the best indicator that a volcano might be very dangerous?
A. ages that indicate the volcano last erupted 10 million years ago B. gentle slopes that signify fast-flowing lavas C. a volcano that contains andesite and welded tuffs D. rock analyses that indicate a low content of silica