How Does Light Allow Me To See?

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Across
  1. 3. This is made to help explain a concept or to help predict what could happen.
  2. 6. The sun, a candle, and a lightbulb are each examples of a light ___.
  3. 7. This is when you collect information using your senses. You are making ___.
  4. 8. This is the opening in the eye.
  5. 9. A shadow is formed behind an object that ___ the path of light.
  6. 13. This is when you look at the strengths and weaknesses of a model. You are ___ it.
  7. 14. A direct ____ is what the light travels on to go to an object and then the eye.
  8. 16. This is a trick that makes the brain think one thing is happening, when reality is something different.
  9. 17. Light must enter the ___ or sensor to be seen or detected.
  10. 18. An ___ can be seen if four conditions are met: there needs to be an ___, an eye, a source of light, and a direct path between the ___ and the eye.
Down
  1. 1. Scientific ___ (SP) are the discoveries we make and the facts we prove to be true as we do our investigations.
  2. 2. This is something that occurs regularly, but makes us wonder how and why it is occurring.
  3. 4. A ___ is seen by detecting that less light reaches the eyes from it than from the area surrounding it.
  4. 5. This means to come to an agreement.
  5. 6. Light travels forever in ___ lines. (Be careful to spell it correctly.)
  6. 10. This is the only thing the eye can detect.
  7. 11. This is a single beam of light.
  8. 12. This is the unit of measurement used to measure how much light the light sensor was detecting.
  9. 13. A good claim is supported with ___. This is the data you collect and the observations that you made that support the claim.
  10. 15. To see an object, the light must _____ off the object and into the eye.