Physics year 2

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Across
  1. 5. A line representing the direction of light.
  2. 7. The imaginary line at right angles to a surface.
  3. 9. Example of a non-luminous object.
  4. 11. Caused by Earth’s axial tilt.
  5. 12. Days in a full Moon phase cycle.
  6. 13. A system of billions of stars.
  7. 15. Allows only one colour of light to pass through.
  8. 17. A measure of the amount of matter in an object.
  9. 21. Hours it takes Earth to rotate once.
  10. 23. Type of eclipse when the Moon is in Earth’s shadow.
  11. 26. One of the primary colours of light.
  12. 27. A natural satellite of a planet.
  13. 30. The distance between two peaks in a wave.
  14. 31. Upward force from displaced fluid.
  15. 33. The increase in length when a material is stretched.
  16. 35. Type of eclipse when the Moon covers the Sun.
  17. 38. Forces can cause this in shape, speed, or direction.
  18. 40. The fastest and longest wavelength light colour.
  19. 41. The force that pulls objects towards each other.
  20. 43. A negatively charged subatomic particle.
  21. 48. Cause of gas pressure in containers.
  22. 51. The scientist whose law relates force to extension.
  23. 53. SI unit of pressure.
  24. 54. A natural form of electric discharge.
  25. 55. Splitting of white light into colours.
  26. 57. What may happen to the universe if it has enough mass.
  27. 59. A substance often sprayed using static charge.
  28. 60. All colours of light have the same one in air.
  29. 62. Earth rotates on this.
  30. 66. What opposite charges do.
  31. 68. The bouncing of light off a surface.
  32. 70. Another way to describe a force.
  33. 71. The range of visible light colours.
  34. 74. A small star, like the Sun.
  35. 78. Tool used to measure mass.
  36. 79. Metal with higher density than water, but can float in ships.
  37. 80. Objects that emit their own light.
  38. 82. Reflects light and forms images.
  39. 83. Causes change in motion or shape.
  40. 84. The force of gravity acting on an object.
  41. 85. Formed from the collapse of a massive star.
  42. 89. The path of a body around another in space.
  43. 90. A positively charged subatomic particle.
  44. 91. The SI unit of force.
  45. 92. Type of pollution removed by electrostatic precipitators.
  46. 93. The amount of space something occupies.
  47. 96. The pulling force in a stretched object.
  48. 97. What like charges do.
  49. 99. When a charged object is connected to the ground.
  50. 100. Force has both magnitude and this.
Down
  1. 1. The region where the material is permanently deformed.
  2. 2. The angle between incoming ray and the normal.
  3. 3. The slowest and shortest wavelength light colour.
  4. 4. Theory about the origin of the universe.
  5. 6. Secondary colour formed from blue and green.
  6. 8. The sum of all forces acting on an object.
  7. 10. Mass divided by volume.
  8. 14. Secondary colour formed from red and green.
  9. 16. you like this exported to a file or as a printable format?
  10. 18. What happens to light in a denser material.
  11. 19. The force due to gravity on a mass.
  12. 20. Electrons do this during charging by friction.
  13. 22. The bending of light as it changes speed.
  14. 24. Tool used to draw light rays.
  15. 25. Mass is a measure of how much of this is in an object.
  16. 26. The Sun will become one as it ages.
  17. 28. Type of speed when no resultant force acts.
  18. 29. A material that allows electric charge to move easily.
  19. 32. One way to describe a force.
  20. 34. Secondary colour formed from red and blue.
  21. 36. The force that opposes motion between two surfaces.
  22. 37. The process of removing charge from an object.
  23. 39. The region where an object returns to original shape after stretching.
  24. 42. Can used to measure volume of irregular objects.
  25. 44. Evidence supporting the Big Bang theory.
  26. 45. Used to measure displaced water volume.
  27. 46. Formed when light is blocked.
  28. 47. A material that does not allow charge to flow easily.
  29. 49. Light rays are drawn as this shape.
  30. 50. A massive ball of gas emitting energy by radiation.
  31. 52. What the universe continues to do.
  32. 55. Increases pressure in a liquid.
  33. 56. Type of electricity involving non-moving charge.
  34. 58. Tiny units that make up matter.
  35. 60. An exploding star.
  36. 61. When one celestial body blocks another.
  37. 63. A subatomic particle with no charge.
  38. 64. To spin on an axis.
  39. 65. Force per unit area.
  40. 67. Used to disperse white light.
  41. 69. Caused by the gravity of the Moon and Sun.
  42. 71. A sudden release of electric charge.
  43. 72. A body orbiting a star, not producing its own light.
  44. 73. State of matter where pressure comes from particle collisions.
  45. 75. What objects do to appear coloured.
  46. 76. Star formed after a supernova.
  47. 77. Pressure is inversely proportional to this.
  48. 81. Tool used to measure force.
  49. 86. The unit of electric charge.
  50. 87. Everything that exists in space.
  51. 88. State of matter that exerts pressure with depth.
  52. 92. The object used in Hooke’s Law experiments.
  53. 94. Happens when an object's density is less than the fluid.
  54. 95. What happens to light in a less dense material.
  55. 98. The point where a material stops obeying Hooke’s Law.