Question

1. which improves air circulation in forced - air heating? (1 point)

○ conduction
○ radiation
○ convection

Explanation:

To determine which process improves air circulation in forced - air heating, we analyze each option:

• Conduction is the transfer of heat through direct contact of particles, and it does not involve the movement of air masses for circulation. For example, heat transfer through a metal rod is conduction.
• Radiation is the transfer of heat in the form of electromagnetic waves (like the heat from the sun reaching the Earth), and it does not rely on the movement of air to transfer heat or improve air circulation.
• Convection is the transfer of heat through the movement of fluids (liquids or gases). In forced - air heating, the air is a gas, and convection (aided by fans in forced - air systems) causes the air to move, thus improving air circulation.

Answer:

convection (the option with "convection" as its text)