Fill in each blank with the correct word from the lesson.

1. _______ is heat moving through a solid — a metal spoon sitting in hot soup gets warm all the way to the handle because heat travels through the metal.
2. Convection is heat moving through liquids and gases — hot air near a heater rises, colder air flows in to replace it, creating a _______.
3. Materials that let heat pass through easily are called conductors — metals are ex_______ent conductors.
4. Heat always moves in one direction — from hotter things to colder things — until they reach the same _______.
5. _______ allow heat to flow; insulators block it.

Choose the best option for each question.

1. A metal spoon in hot soup gets warm — what type of heat transfer is this?
   a) Convectionb) Radiationc) Conductiond) Insulation
2. How does the Sun's heat reach Earth?
   a) Conduction through spaceb) Convection through airc) Radiation through empty spaced) Carried by solar wind only
3. Why does a woollen jacket keep you warm?
   a) It generates heatb) Wool is a conductorc) It traps body heat as an insulatord) It reflects sunlight

Write T for True or F for False in the brackets.

1. It travels by conduction through solids, convection through fluids, and radiation through space.
2. It travels by Convection through solids, convection through fluids, and radiation through space.
3. Radiation through empty space is one of the key concepts in the lesson on Blow Hot, Blow Cold.
4. Conduction through space is the main topic of this lesson.

1. In your own words, explain what Blow Hot, Blow Cold means.
2. List two things you learned from this lesson on Blow Hot, Blow Cold.