Multiple Choice
The mid-ocean ridges are elevated above the surrounding sea floor because ____________.
A) ridge rocks are hot and therefore of relatively low density
B) the lithospheric plates are thickest at the ridges so that they stand up taller
C) rising ocean currents leave a vacuum above the ridge
D) ridge rocks are mafic, whereas the ocean basin crust consists of ultramafic rock
Correct Answer:
Verified
Correct Answer:
Verified
Q6: In Wegener's evidence for continental drift,continents were
Q15: The San Andreas Fault zone in southern
Q16: Consult the figure below.Hawaii is an example
Q22: Why does the surface area of Earth
Q23: The rate of motion of a lithospheric
Q24: Why does each continent below have a
Q32: Volcanoes that have submerged beneath the surface
Q34: At transform plate boundaries _.<br>A)earthquakes are common
Q36: All basalts younger than 700,000 years old
Q64: Large,thick,nonvolcanic mountain belts,like the Himalayas,have features associated