What is thermal energy?

• Energy from heat due to movement of particles

• Energy from light due to electromagnetic waves

• Energy from sound due to vibrations

• Energy from chemical reactions

Which method of heat transfer does not require a medium?

• Conduction

• Convection

• Radiation

• Evaporation

Why are metals good conductors of heat?

• Their particles are closely packed

• They have a high density

• They are shiny and reflective

• They are malleable

What happens to a fluid when it is heated?

• It becomes less dense and rises

• It becomes more dense and sinks

• It evaporates immediately

• It solidifies

How does the sun's energy reach the Earth?

• Through radiation

• Through conduction

• Through convection

• Through reflection