energy revision

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Across
  1. 4. ? heat capacity amount of energy needed to raise the temp of 1kg by 1C
  2. 6. force x distance
  3. 11. energy transfer to the environment
  4. 13. useful energy output/total energy input
  5. 16. type of potential energy when objects are moved upwards
  6. 18. trapped air stops this type of heat transfer
  7. 19. mass x gravitational field strength
  8. 21. type of insulation surrounding a hot engine
  9. 22. a poor conductor of heat
Down
  1. 1. another word for movement energy
  2. 2. unit of energy
  3. 3. rate at which work is done or transferring energy
  4. 5. another word for stored energy
  5. 7. type of stored energy in springs
  6. 8. unit of power
  7. 9. ? of energy, energy cannot be created or destroyed
  8. 10. reduces friction in moving parts of a machine
  9. 12. energy that will not run out
  10. 14. type of wall insulation
  11. 15. renewable energy from hot rocks
  12. 17. unit of force
  13. 20. renewable resource from the sun
  14. 21. energy produced by the moon