Grade 4 Light and Shadow

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Across
  1. 2. a light source
  2. 5. a flat surface that can reflect light
  3. 9. ancient way to tell time using shadow
  4. 10. the process of bouncing light
  5. 11. formed when light is bent at a certain angle by water
  6. 12. some light can pass this material
  7. 14. light can not pass this material
  8. 15. seven different colors of visible light
Down
  1. 1. the amount of light
  2. 3. a black image
  3. 4. object that can separate visible light into 7 different colors
  4. 6. all light can pass this material
  5. 7. formed when light is blocked
  6. 8. tool to measure light intensity
  7. 10. the process of bending light
  8. 13. needed to see shadow