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