Heat on the Move
Class 7 Science: heat (conduction, convection and radiation)
Heat a metal rod and watch wax pins drop, see warm water rise in a beaker, and find out which shirt the Sun heats faster.
Words to know
- Conduction
- Heat passing through a solid from the hotter part to the colder part.
- Convection
- Heat carried by a moving liquid or gas: warm parts rise and cool parts sink.
- Radiation
- Heat that travels without any material, like heat from the Sun.
- Conductor
- A material that lets heat pass easily, like copper and steel.
- Insulator
- A material that does not let heat pass easily, like wood and plastic.
Quick check
Answer 3 questions to check what you learned.
Try at home
Put a steel spoon and a wooden spoon in a cup of hot water (ask an adult). After a minute, gently touch the handles. Which is warmer?