Isostasy is
A)crustal equilibrium relative to the mantle.
B)the buoyant force exerted on the mantle by oceanic crust.
C)the buoyant force exerted on the mantle by continental crust.
D)crustal equilibrium relative to Earth's surface.

Question

Quizplus · Accepted Answer

Isostasy refers to the state of equilibrium that exists between the Earth's crust and the underlying mantle. More specifically, it is the buoyant force of the mantle that supports the weight of the crust, allowing it to "float" on top of the denser mantle. Therefore, isostasy is the crustal equilibrium relative to the mantle, as stated in option A. Options B and C are only partially correct since they describe the buoyant force exerted by specific types of crust (oceanic and continental) rather than the overall relationship between crust and mantle. Option D is too vague and does not accurately capture the concept of isostasy.

Isostasy Is