Checkpoint: how heat moves

A metal spoon stands in hot dal. How does heat reach the handle?

• It jumps across the air around the spoon
• Moving metal carries it up
• It passes along the metal, which stays in place

Warm water at the bottom of a pan rises. What is this movement called?

• Conduction
• Radiation
• Convection

How does the Sun's heat reach the Earth?

• By conduction through the air
• By convection currents flowing through space
• By radiation across empty space

Which part of a pan stays cool enough to hold?

• A wooden handle
• A copper handle
• A steel handle

Two identical blocks touch, at 80 °C and 40 °C. No heat escapes. Where do they end?

• 80 °C and 40 °C
• Both at 40 °C
• Both at 60 °C