Christmas revision lesson

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Across
  1. 5. A type of cell which has a nucleus.
  2. 7. The energy transfer when energy moves from hot to cold areas.
  3. 8. Reaction where reduction and oxidation happens at the same time.
  4. 9. A material which conducts heat or electricity.
  5. 12. The potential energy of an object at height.
  6. 13. These make up all living things and contain organelles.
Down
  1. 1. Used to describe ways energy is wasted.
  2. 2. How good a device is at transferring energy input to useful energy output.
  3. 3. The type of chemical reaction which results in energy being released into the surroundings, often resulting in an increase in temperature.
  4. 4. The energy of a moving object.
  5. 6. The type of chemical reaction which results in energy being absorbed from the surroundings, generally leading to a decrease in temperature
  6. 8. Energy transferred as a wave, light, infra-red, gamma, x-ray.
  7. 9. The _______ of energy: energy cannot be created or destroyed, just transferred from one form to another.
  8. 10. The energy stored in chemical bonds, such as those between molecules.
  9. 11. The measure of how tightly the mass of an object is packed into the space it takes up.