Physics

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Across
  1. 3. A force that pushes things in a liquid and gases.
  2. 5. A way of transferring energy by waves. Light waves can travel through transparent materials and through empty space.
  3. 6. A name used to describe energy when it stored in stetched or squashed things that can change back to their original shapes. Another name for elastic potential energy.
  4. 8. An energy resource that will never run out (e.g solar power .
  5. 9. To change speed.
  6. 12. A way of describing the steepness of a line in a graph in numbers . It is calculated by taking the vertical distance between two points and dividing by the horizontal distance between the same two points.
  7. 14. A point about which something turns . Another name for a pivot.
  8. 15. A name used to describe energy when it is stored in hot objects . The hotter something is the more thermal energy it has.
  9. 19. The speed of one object compared to another - both objects could be moving .
  10. 20. change shape
  11. 21. The amount of force which gravity pulls something towards the Earth. It is measured in newtons (N).
  12. 22. Unit for speed when the distance is measured in kilometers the time is measured in seconds.
Down
  1. 1. A graph that shows how far and how fast something travels during a journey . Steeper lines on the graph shows faster speed .
  2. 2. A name used to describe energy.
  3. 4. Energy from the sun.
  4. 6. How fast something is moving. Often measured in meters per second (m/s) or kilometers per hour (km/h).
  5. 7. The unit for the moment of force.
  6. 10. The weight or force on something. For a machine , the load the weight that is being moved .
  7. 11. The energy transferred when a force moves an object. It is calculated using the size of the force and the distance moved by the force. The unit for work is the joule (J)
  8. 13. A lever or other machine where the load is bigger than the effort.
  9. 16. A sloping surface. A ramp is a force multiplier: it needs less force to pull something up a ramp than it does to lift it directly.
  10. 17. A way of transferring energy by waves. Sound waves travel through substances . They cannot travel through a vacuum
  11. 18. speed The total distance something travels divided by the total time taken is the mean (or average) speed for a journey.