P1.1 AQA Physics Test

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  • Created by: Cookie-01
  • Created on: 31-03-16 13:48

1. Why does a fluid become less dense when heated ?

  • this is because it expand so same amount of mass but in a larger volume
  • this is because some of the water evaporates
  • this is because you loose energy
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2. Why is a painted object dull black colour better for absorbing energy

  • A dull black colour absorbs energy much quicker
  • It slowly absorbs energy

3. Why are saucepans often made of metal with wooden handles ?

  • Metal is a good conduction of heat so can heat up the food quickly & the wooden handle is a poor conductor of heat so you don't burn yourself
  • The metal is a good conductor of heat and so is wood so it cooks your food quicker
  • Metal is a bad conductor of heat so less likely to burn yourself

4. Why does a solid have a fixed volume ?

  • All the particles are held together in fixed positions
  • Solid particles move around so the volume stays the same
  • Solids don't move and they are hard

5. Why are houses in hot countries often painted white ?

  • They reflect heat and sun
  • They absorb heat and sun
  • It makes them look pretty

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