11/23/10

Where do shadows come from?


Click here to watch an animation of shadows!


Have you ever wondered why your shadow looks really tall in the morning, but when you go outside for lunch, your shadow looks short? When it's getting close to dinner time, your shadow looks long and tall again!

Let's think about this for a minute...

We know that sun isn't really moving. We know that the Earth is rotating (spinning) on it's axis every day, and this causes one side of the earth to always be on dark side, and the other side to always be on the light side. This is why we have day and night!


While earth is spinning, the sun's position in the sky changes. The sun's light points in different directions as it moves across the sky. This causes shadows to change and look different.






Click on the sun to play a game about shadows!





  1. Does the sun move?
  2. What is the relationship between the length and direction of a shadow and the sun?
  3. Why are the shadows at night if there is no sunlight?

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