Across
- 1. The same in all places.
- 3. Measured in kilograms.
- 8. forces When the forces in opposite directions on an object are the same size. Zero resultant force.
- 11. The time taken for one complete wave.
- 12. The unit for measuring voltage.
- 13. A push, pull or twist. Measured in Newtons.
- 14. A place where there is no matter at all.
- 17. The energy needed to raise the temperature of 1 kg of a substance by 1 degree Celsius.
- 18. A tiny particle with a negative charge.
- 19. Any energy source that will never run out.
- 21. To give out.
- 22. An electrical circuit that allows current to take more than one route.
- 23. A component that only allows current to flow in one direction through it.
- 26. The time taken to respond to a stimulus.
- 29. A wave where the vibrations are parallel to the direction of motion.
- 32. A unit for temperature.
- 33. An instrument for measuring voltage.
- 35. The unit of energy.
- 37. A component whose resistance decreases as the temperature increases.
- 38. Measured in m/s.
- 40. The unit of current
- 42. Speed in a given direction.
- 43. The total force acting on an object.
- 44. Whether a sound is high or low.
- 45. The correct word for one battery.
Down
- 2. Any energy source that will run out.
- 4. The temperature at which all motion stops. -273 degrees Celsius
- 5. The change in direction of a wave as it goes from one medium to another.
- 6. The force that causes an object to follow a circular path. It acts towards the centre of a circle.
- 7. The upward force exerted by a fluid.
- 9. A resistor whose resistance decreases when light is shone on it.
- 10. The space around an object with an electric charge where it can affect other objects.
- 15. When an object changes speed
- 16. A material which stops heat flowing from one object to another.
- 20. The unit of power.
- 24. Spread out.
- 25. A vector has both ..... and direction.
- 27. The transfer of heat energy by a moving fluid (hot air rises).
- 28. A line drawn at right angles to the surface of a mirror.
- 30. A piece of apparatus used to measure the speed of a fast moving object.
- 31. A force which opposes (acts against) motion.
- 34. The unit for magnetic flux density (also a very fast car).
- 36. The unit of electrical resistance.
- 38. A diagram showing energy transfers. The width of the arrow is proportional to the amount of energy that it represents.
- 39. The force due to gravity.
- 41. The number of vibrations per second. Measured in Hertz.