Evaluate the statement. "Convection occurs because of conduction and radiation at the boundaries of a liquid."
A) This statement is true in the laboratory but not true for Earth processes.
B) This statement is false because the three types of heat transfer operate separately.
C) This statement is true in the laboratory and for Earth processes.
D) This statement is false and should say, "Conduction occurs because of convection and radiation at the boundaries of a liquid."

Question

Quizplus · Accepted Answer

Convection occurs because heat is transferred from one part of a fluid to another by the motion of the fluid itself. This motion is usually caused by differences in temperature, which cause the fluid to expand and rise (creating convective currents) or contract and sink (creating convective currents in the opposite direction). Conduction and radiation can contribute to the heat transfer at the boundaries of the fluid, but they are not the primary causes of convection. This statement is therefore true both in the laboratory and in Earth processes.

Evaluate the Statement