Year 7 Physics

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Across
  1. 4. A force that opposes movement through air or water.
  2. 5. A dark area formed when light is blocked.
  3. 6. The opening in the eye that lets light enter.
  4. 8. Movements that travel as sound waves.
  5. 12. The organ used for hearing.
  6. 14. The spiral-shaped part of the inner ear that detects sound.
  7. 16. What light does during refraction.
  8. 17. RAY A line used to show the path of light.
  9. 19. The light-sensitive layer at the back of the eye.
  10. 20. A push or pull that can change an object's motion.
  11. 22. To bounce light off a surface.
  12. 23. The ability to make things happen or change.
  13. 24. A change in position over time.
  14. 25. A form of energy that travels as vibrations.
  15. 27. RESISTANCE Another name for drag when moving through air.
  16. 28. The transparent front part of the eye.
  17. 29. A smooth surface that reflects light.
  18. 30. The force that pulls objects towards Earth.
  19. 32. NERVE Carries messages from the eye to the brain.
  20. 34. The force caused by gravity acting on an object.
  21. 35. NERVE Carries sound information from the ear to the brain.
  22. 36. A force that opposes movement between two surfaces.
  23. 37. How fast an object is moving.
  24. 39. A space with no particles through which sound cannot travel.
  25. 41. A membrane that vibrates when sound waves hit it.
  26. 43. A form of energy that allows us to see.
  27. 45. How loud or quiet a sound is.
  28. 46. A reflected sound wave.
Down
  1. 1. A transparent object that bends light.
  2. 2. A material that allows most light to pass through.
  3. 3. FORCES Forces that are equal in size and opposite in direction.
  4. 7. The coloured part of the eye that controls pupil size.
  5. 9. The height of a wave, linked to loudness.
  6. 10. FORCES Forces that cause an object to speed up, slow down or change direction.
  7. 11. A way in which energy is transferred.
  8. 13. The bouncing of light from a surface.
  9. 15. A material that does not allow light to pass through.
  10. 18. WAVE A wave produced by vibrating objects.
  11. 21. The organ used for vision.
  12. 22. The bending of light as it passes between materials.
  13. 25. An object that produces light.
  14. 26. A back-and-forth movement that produces sound.
  15. 31. A material that lets some light through but scatters it.
  16. 33. The substance through which sound travels.
  17. 38. The amount of matter in an object.
  18. 40. The number of vibrations per second.
  19. 42. How high or low a sound seems.
  20. 44. The unit used to measure force.