days:fall2012daybyday:fall2012day3:reviewing_resources_powerful_ideas_about_light_ray_diagrams_and_scientific_explanations

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======Reviewing Resources, Powerful Ideas about Light, Ray Diagrams and Scientific Explanations======

**Resource**
Young children's pictures of the sun with straight rays leaving in all directions.

**Powerful Ideas**
  * Light travels outward in all directons from a light source
  * Light travels in straight lines
  * Light travels outward in all directions from an object we can see
  * To see an object, light has to travel from the object to your eye

**Scientific Explanation**
  * sketch the situation
  * state the relevant powerful ideas
  * draw careful ray diagram to represent what is happening to the light rays
  * use powerful ideas to explain the phenomenon 






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