Question

a house is heated during winter using a furnace. 1. sunlight shines through the window and warms the floor. 2. heat travels through the metal pipes carrying hot water. 3. warm air rises from vents into the rooms. 4. cold air sinks toward the floor as warm air rises. which description best represents convection? a description 1 b description 2 c description 3 d description 4

Explanation:

Convection is the transfer of heat by the movement of a fluid (liquid or gas). In description 3, warm air (a gas) rises from vents into the rooms, which is a clear example of heat transfer by the movement of a fluid. Description 1 is radiation (sunlight heating the floor), and description 2 is conduction (heat through metal pipes). Description 4 is part of the overall convective - air circulation process but description 3 is the most direct representation of convection.

Answer:

C. Description 3