Light travels in ____ lines from a ____of light that bounces off an object. We can see the object because the light ____ our eyes. Wood and cupboard are ____ materials that light cannot travel through. ____ is a ____ material which allows light to pass through. Tissue paper is ____ material which will let some light through.When an object blocks out the light, a ____ is formed. Shadows are ____ at midday and ____ at the beginning and end of the day.

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