Heat Transfer

What is heat in thermodynamics?

• The feeling of warmth

• The transfer of energy due to a temperature difference

• The movement of particles in an object

• The amount of energy an object contains

What happens when two objects reach thermal equilibrium?

• Heat flows continuously between them

• They both become extremely hot

• Heat flow stops because their thermal energy is balanced

• One object transfers all its heat to the other

Which of the following is an example of heat transfer by conduction?

• Feeling the warmth from a campfire

• Water boiling in a pot

• A metal spoon getting hot when left in hot soup

• Warm air rising and cool air sinking in the atmosphere

How does heat from the sun travel through the vacuum of space to warm Earth?

• Conduction

• Convection

• Radiation

• Thermal equilibrium

Which is an example of convection?

• Cold water sinking in a pool.
• Heat radiating from a stove.
• Ice melting on a warm surface.
• Warm air rising in a room.