The average elevation of the exposed land is
A) 875 m (2870 ft.). B) -2070 m (-6790 ft.).
C) 100 m (325 ft.). D) -3800 m (-12,470 ft.).
A
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How did seafloor spreading revive Alfred Wegener's ideas about continental drift?
A) Sea floor spreading relied on new fossil evidence documenting the former joining of the continents. B) Sea floor spreading provided an explanation for the consumption of oceanic crust at plate boundaries. C) The topography of the ocean floor demonstrated that mountain ranges on either side of the Atlantic Ocean were formerly joined. D) Sea floor spreading prevented a viable mechanism for moving the continents.
Blowing a threatening extraterrestrial object into small pieces would likely increase the hazard to Earth
Indicate whether the statement is true or false
Glacial ice forms more quickly in polar environments than in midlatitude, alpine environments
Indicate whether the statement is true or false
Which of the following is a correct IUPAC name?
A) 2-ethyl-3-methylpentane B) 2,2-dimethylpentane C) 2,2-diethylpentane D) all of them