Question

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2. The minimum temperature at which a substance catches fire and starts burning is known as its ________ (inflammable temperature/ignition temperature).

3. The change of state from a liquid into a vapour at a temperature below the boiling point is________(evaporation/condensation).

4. Boiling and evaporation are examples of ________(vaporization/liquefaction).

5. Freezing involves __________ (absorption of energy/release of energy).

6. Generally solids _______(expand/contract) on cooling and ________ (expand/ contract) on heating.

7. Moth balls and camphor are materials that undergo _________(sublimation/ vaporization).

8. Different types of solids and liquids expand by __________ (same/different) amounts when given the same amount of heat.

9. Good absorbers are _________ (bad/good) emitters of radiant heat. ​

Answer 1

Answer:

2) ignition temperature

3) condensation

4) vaporization

5) absorption of energy

6) i| contract

ii | expand

7) vaporization

8) different

9) good

Explanation:

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