Question

Why does convection occur?(1 point)

Responses

Heat increases the kinetic energy of molecules; the molecules have greater energy when they collide, increasing energy transfer.
Heat increases the kinetic energy of molecules; the molecules have greater energy when they collide, increasing energy transfer.

Heat flows through the air as electromagnetic radiation, transferring energy without matter.
Heat flows through the air as electromagnetic radiation, transferring energy without matter.

Heat causes fluids to become less dense; so warmer fluids rise above cooler fluids, transferring energy.
Heat causes fluids to become less dense; so warmer fluids rise above cooler fluids, transferring energy.

Heat is released during some types of reactions and absorbed during others, transferring energy to the system or surroundings.

Answer 1

[AI-generated answer — Bot GPT 3.5]

Both the first and third responses are correct. Heat increases the kinetic energy of molecules, causing them to collide more frequently and transfer energy. This is true for both gases and liquids, which are fluids. In fluids, heat also causes the molecules to become less dense, making warmer fluids rise above cooler fluids in a process known as convection. This transfer of energy through the movement of fluids is called convection.