P1

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Author:
McAuley
ID:
154139
Filename:
P1
Updated:
2012-05-16 07:26:18
Tags:
p1 mcauley
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Description:
science questions
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  1. what does a black mat surface do?
    absorb heat
  2. heat energy can be transferred by radiation, conduction and what?
    convection
  3. how does heat transfer through objects?
    vibrations
  4. why are metals good conductors of heat?
    they are free of electrons
  5. why does heat rise?
    because it gets less dense
  6. why does cold air desend?
    because it is more dense
  7. what happens when gas cools?
    the particles slow down and they lose kinetic energy
  8. what is evaporation?
    Evaporation is when a liquid turns into a gas
  9. why do desert foxes have big ears and artic foxes have small ears?
    because the bigger the ears the more heat lost.
  10. how do cooling fins effect engines?
    they increase the surface area to spead up cooling
  11. what are the most effective methods of insulation?
    the ones that give you the biggest annual saving.

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