Understanding Heat Transfer

What is the primary direction of heat transfer?

• From a body with equal temperature to another

• From a body with higher temperature to one with lower temperature

• From a body with lower temperature to one with higher temperature

• From a cooler body to a warmer body

Which material is a good thermal conductor?

• Metal

• Plastic

• Glass

• Wood

What happens to the molecules of a hot object when they come into contact with a cooler object?

• They move faster and transfer energy

• They stop moving

• They move in random directions

• They slow down

In convection, what causes the circular movement in fluids?

• The presence of magnetic fields

• The gravitational pull

• The difference in density between warmer and cooler particles

• The rotation of the Earth

How does radiation transfer heat?

• Through direct contact

• Through sound waves

• Through electromagnetic waves

• Through the movement of fluids