Y8 Energy Topic Revision

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Across
  1. 2. '___________ of energy' is the total energy stored before = total energy stored after.
  2. 4. Device that is made to rotate by mechanical working.
  3. 6. The rate of energy transfer. Measured in watts (W).
  4. 7. Energy resources that can be easily replenished or are effectively limitless. These resources will not run out by being used.
  5. 9. energy store of a moving object.
  6. 10. Thermal ___________ - A situation where two objects are at the same temperature and there is no overall transfer of energy by heating between them.
  7. 11. When energy is transferred so that it is stored in less useful ways, eg by heating to the surroundings.
  8. 13. A material that does not allow current to flow through it easily, eg wood or glass.
  9. 14. Hotter fluid is less dense than colder fluid so it rises. Energy is transferred by the moving fluid.
  10. 15. Energy = power X ________
Down
  1. 1. The rise in the average temperature of the Earth's surface.
  2. 3. Energy transfer by heating through a material due to collisions between particles.
  3. 5. An energy resource that cannot be replenished. This resource will eventually run out because we are using it.
  4. 7. Electromagnetic wave emitted from a hot object.
  5. 8. Batteries, foods and fuels store energy in their ___________ energy stores.
  6. 12. The unit of measurement for energy (J). A kilojoule (kJ) is 1000 joules.