Humber/Ontario Real Estate Course 4 Exam Practice

What is the principal difference between convection and conduction concerning heating gain/loss?

1. Convection happens through a solid object, while conduction moves gas

2. Convection occurs only in winter; conduction can happen anytime

3. Convection is illustrated by sunlight, and conduction by gas furnaces

4. Convection happens as hot air rises; conduction is heat transferring through window frames

The correct answer is: Convection happens as hot air rises; conduction is heat transferring through window frames

Convection and conduction are both methods of heat transfer, but their processes differ. In convection, heating gain/loss occurs as hot air rises and cold air sinks, creating a cycle of circulation. This movement is commonly seen in rooms when a heater warms the air, causing it to rise and circulate throughout the space. On the other hand, conduction involves the transfer of heat through a material, such as when heat transfers through window frames or other solid objects. This means that the principal difference between convection and conduction concerning heating gain/loss lies in how the heat is transferred - convection involves the movement of air while conduction occurs through solids like window frames.