All About Light and Dark
You probably don’t think much about light and dark. After all, you can turn on a switch and the lights go on. Even in the middle of the night, you can have light. Two hundred years ago, though, people were very aware of light and dark. They worked during the day when
Posted in Physics/Chemistry/Technology | Tags : All About Light and Dark, what is light and dark, light and dark, light, dark, all about light and dark for kids, facts about light and dark, lightness, darkness, sources of light
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