Energy and change and system and control

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Across
  1. 4. energy, the energy we need to ‘put in’ to start a fuel burning
  2. 5. a rod that turns, with blades arranged like a wheel around it
  3. 10. socket, the part of the wall where an electrical appliance can be connected to an electrical circuit
  4. 11. to put something out
  5. 12. cell, changes the energy in chemicals into electricity
  6. 15. a machine that produces electricity
  7. 16. source of stored energy that is made of one or more cells
  8. 18. a rod attached to a wheel
  9. 19. axle, a system in which the axle remains fixed while the wheels rotate around it
  10. 20. people who are trained to help put out uncontrolled fires
  11. 23. centre point
  12. 24. parts of a machine that do specific jobs to make the machine work
Down
  1. 1. energy, energy that is stored in something, for example in food or fuel; it can be changed
  2. 2. energy, the energy, such as heat and light energy, that is produced when a fuel burns
  3. 3. to keep something from happening
  4. 6. controls, the electricity in an electric circuit
  5. 7. box, the place where electricity from a substation is connected to the electrical circuits in a building
  6. 8. a material that returns quickly to its original shape after it has been bent or stretched.
  7. 9. the part of an electrical appliance that can be connected to a wall socket
  8. 13. circuit, a system that provides a path for the transfer of electricity
  9. 14. a substance that can be eaten or burned to produce energy
  10. 17. two or more parts that work together to carry out a function
  11. 21. axle, a system in which the axle turns together with the wheels
  12. 22. squeeze or push the parts of something together.