Heat, Energy, Conduction, Convention, Insulation, Convection, Insulation and Reflection.

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Across
  1. 2. We get this from food and use a lot of this when we run.
  2. 4. One of the states of matter. Things like coffee, water and soda are all classed as this, The word starts with an "L".
  3. 6. A school subject involving chemistry, biology, physics etc.
  4. 7. What everthing is made of; they contain a nuecleus, protons and electrons.
Down
  1. 1. Fire does this to wood, creating a lot of heat.
  2. 3. The sun creates this (heat and light energy together).
  3. 5. What fire creates. It is measured in temperature.
  4. 6. A huge star that creates a lot of heat and light energy.