Year 8 P2 - Can you guess the topic?

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Across
  1. 4. The transfer of energy by the movement of gases or liquids.
  2. 6. A radioactive element that can be used as a fuel in nuclear power stations.
  3. 7. Substances that can be burnt to release
  4. 10. Instrument used to measure temperature.
  5. 12. The electrical and magnetic forces or effects produced by an electric current.
  6. 16. The transfer of energy as a wave.
  7. 17. A measure of how hot or cold something is, measured in degrees Celsius.
  8. 18. The unit of power symbol W.
  9. 19. A simple machine that reduces the force needed to lift an object by a certain height.
Down
  1. 1. The unit of energy, symbol J.
  2. 2. A material that does not conduct electricity or transfer energy well.
  3. 3. 1 kilojoule = 1000 J symbol kJ.
  4. 4. A way in which energy is transferred through solids, and to a much lesser extent in liquids and gases.
  5. 5. A simple machine that multiplies the force.
  6. 8. Objects are at thermal equilibrium when they are at the same temperature.
  7. 9. A way of transferring energy that does not involve heating.
  8. 11. Energy resources whose supply will not run
  9. 13. Associated with changes in temperature or with work.
  10. 14. 1 kilowatt = 1000 W symbol kW.
  11. 15. A material that conducts charge or energy well, such as a metal or graphite.