Unit 5.2

Edit Answers
1234567891011
Across
  1. 3. An object that emits thermal energy by radiation is called a ______.
  2. 4. The colour of clothes we should not wear in summer because it is a good absorber of radiation. ANS: ______ coloured clothes.
  3. 6. The material commonly used for making food containers. It is a good insulator.
  4. 7. An object that absorbs thermal energy by radiation is called an _______.
  5. 9. Non-metals are good ________.
  6. 11. In this heat transfer process, thermal energy is transferred from the hot end to the cold end of an object.
Down
  1. 1. The direction where the liquids or gases move in convection.
  2. 2. Metals are good ______.
  3. 5. This heat transfer process only takes place in liquids and gases.
  4. 8. This heat transfer process can take place in vacuum. And it occurs in all directions.
  5. 10. It is a good insulator. The fur and feathers on animals trap it to keep their body warm.