Title rated 4.5 out of 5 stars, based on 1 ratings(1 rating)
Book, 2010/08/01
Current format, Book, 2010/08/01, North American ed, No Longer Available.
Book, 2010/08/01
Current format, Book, 2010/08/01, North American ed, No Longer Available. Offered in 0 more formats
Explains where light comes from, why it is dark at night, how light travels, what makes loud and quiet sounds, how people make sounds, and how sounds can be blocked.
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