Question

Which of these describes how heat transferred by convection?

a. Warm air rises and takes heat with it; eventually it cools and sinks
b. Air molecules touch the warm ground, heating it up
c. Land and ocean absorb and re-emit heat from the sun
d. Sunlight travels through space without the aid of fluids or solids

Answer 1

Answer;

A. Warm air rises and takes heat with it; eventually it cools and sinks

Explanation;

• Heat transfer involves exchange of heat or thermal energy between two systems, such that heat flows from the system with higher temperature to the one with low temperature.
• Convection is one of the three types of heat transfer, others being conduction and radiation.
• Convection involves heat transfer in fluids. Heat is transferred by mass motion of a fluid such as water or air when heated and caused to move away from the heat source carrying thermal energy with it.