Science physics crossword puzzle

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Across
  1. 4. A force between two objects that are touching.It usually acts to slow things down or prevent movement
  2. 5. A way of transferring energy by waves.Sound waves travel through substances.They cannot travel through a vacuum
  3. 6. Energy from the Sun.
  4. 14. A force that slows things down that are moving through water. It is caused by friction and by the object pushing the water out of the way
  5. 15. A point about which something turns. Another name for fulcrum.
  6. 16. The weight or force on something. For a machine, the load is the weight that is being moved.
  7. 17. A lever or other machine where the load moves further than the effort.
  8. 19. To change speed
  9. 20. A name used to describe energy when it is stored in stretched or squashed things that can change back to their original shapes.Another name for elastic potential energy.
  10. 21. A point about which something turns. Another name for a pivot.
  11. 22. The amount of force with which gravity pulls something towards the Earth
  12. 24. The speed of one object compared to another - both objects could be moving
  13. 25. A lever or other machine where the load is bigger than the effort.
Down
  1. 1. The idea that energy can never be created or destroyed, inly transferred from one store to another.
  2. 2. A way of describing the steepness of a line on a graph in numbers.
  3. 3. A name used to describe energy when it is stored in chemicals. Food, fuel and batteries all store chemical energy
  4. 7. A simple machine that consists of a long bar and a pivot. it can increase the size of a force or increase the distance the force moves.
  5. 8. A name used to describe energy when it is stored in objects in high spaces that can fall down
  6. 9. A name used to describe energy when is is stored in moving things
  7. 10. The turning effect of a force. It is calculated by multiplying the force by the perpendicular distance of the force from the pivot
  8. 11. The force put on something, especially a lever or other simple machine.
  9. 12. In balance.
  10. 13. Spread out
  11. 18. A name used to descrive energy when it is stored in hot objects. The hotter something is the more thermal energy it has.
  12. 23. Change shape