Deepen your understanding of conduction, convection, and radiation, and their real-world applications.
Conduction transfers heat through direct particle contact, common in solids. Convection transfers heat through the movement of fluid particles, common in liquids and gases.
Why are cooking pots often made of metal but have plastic handles?
Metal conducts heat well for cooking, while plastic (a poor conductor/insulator) keeps the handle safe to touch
Why does hot air rise in a room?
Heated air becomes less dense and rises, creating a convection current
Radiation transfers heat via electromagnetic waves without needing a medium, and is how the sun warms the Earth.
Why do people wear light-colored clothes in summer?
Light colors reflect more radiant heat, keeping the wearer cooler, while dark colors absorb more heat
Why can you feel heat from a fire without touching it?
The fire emits heat through radiation, which travels through the air (or even a vacuum) to reach you
1. Why do metal utensils have insulated handles?
2. Why does hot air rise?
3. Why do dark clothes feel hotter in the sun than light clothes?
4. Which method of heat transfer doesn't require a medium?
5. Give an example of convection in daily life.