Heat Transfer and Thermal Equilibrium

What is heat in science?

• A type of light

• The transfer of energy from a warmer object to a cooler object

• A solid material

• The speed at which an object moves

What happens when two objects reach thermal equilibrium?

• They both become very hot

• They start to move faster

• They reach the same temperature and heat stops flowing between them

• One object melts and the other freezes

Which of these is an example of heat transfer by conduction?

• Feeling the warmth from the sun

• Water boiling in a pot

• A metal spoon getting hot when left in hot soup

• Feeling the heat from a campfire

How does heat from the sun reach Earth?

• Through conduction

• Through convection

• Through radiation

• Through direct contact with the sun