3. Convection is the transfer of heat through the rising and sinking of a fluid. A student is
constructing an explanation for how convection
currents form in the mantle. Which statement
would be most useful for the student to include in
the explanation?
A. Earth's temperatures increase with
.
depth.
B. The mantle is the thickest of Earth's
four main layers.
OC. The mantle contains gases mixed with
rock.
D. Temperatures are about the same
throughout the mantle.