S1 Physics - Heat (Convection & Radiation)

What is convection?

• Transfer of heat by direct contact

• Transfer of heat by radiation

• Transfer of heat through fluids

• Transfer of heat through solids

Which of the following materials is most likely to undergo convection?

• Water

• Metal

• Wood

• Stone

How does convection transfer heat in a fluid?

• By movement of particles

• By radiation

• By conduction

• By melting

What happens to heated air in a convection current?

• It rises

• It sinks

• It stays the same temperature

• It cools rapidly

How does radiation transfer heat?

• Through direct contact

• Through electromagnetic waves

• Through particle movement

• Through fluid motion

Which of these objects emits the most radiation?

• A cold metal object

• A hot metal object

• A glass object

• A plastic object

What is the primary difference between radiation and conduction?

• Radiation requires a medium; conduction does not

• Radiation transfers heat through waves; conduction requires contact

Which material is a good emitter of radiation?

• Shiny metal

• Black, rough surface

• Clear glass

• Transparent plastic

Which of the following is an example of convection?

• A pot of boiling water

• A metal spoon heating up in soup

• A person feeling warmth from the sun

• A campfire

How does radiation differ from convection?

• Radiation requires a medium to transfer heat

• Radiation transfers heat through electromagnetic waves

• Convection transfers heat through particles

• Convection only happens in solids