Explore the three ways heat moves — conduction, convection, and radiation — and see them in everyday examples.
Conduction transfers heat through direct contact between particles, common in solids. Convection transfers heat through the movement of fluid (liquid or gas) particles.
Why does a metal spoon become hot when left in a hot cup of soup?
Heat travels through the metal by conduction, from particle to particle
Why does hot water rise to the top of a pot while it's being heated?
Heated water becomes less dense and rises, creating a convection current
Radiation transfers heat through electromagnetic waves and doesn't need a medium to travel, unlike conduction and convection.
How does heat from the sun reach the Earth through empty space?
By radiation, which can travel through a vacuum since it doesn't need particles to carry it
Why do you feel warmth standing near (but not touching) a fire?
The fire's heat reaches you through radiation
1. Name the three methods of heat transfer.
2. Which method of heat transfer doesn't need a medium?
3. Why do we use wooden or plastic handles on cooking pots?
4. Give an example of convection in daily life.
5. Why does a metal railing feel colder than a wooden railing on a cold day, even though both are the same temperature?