Carboniferous Period – Geology
Dragonfly When was the Carboniferous period? With the end of the Devonian period about 359 million years ago, the Carboniferous period got started. More about the Devonian Quick summary of [...]
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Who made the first hot air balloon? Ancient China
Kongming's Light, made by kids at Laurelhurst School, Portland Oregon Kites came first People in China started to fly kites made of silk and bamboo by about 800 BC. Maybe flying [...]
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Calcium project – Chalk and lemon juice – Chemistry
Need chalk? Buy chalk Chalk has calcium in it Take a piece of regular white chalk, like for writing on a blackboard. Make sure the chalk is calcium carbonate like [...]
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Calcium – Atoms and Chemistry
Chalk cliff (made of calcium atoms) in Cottonwood Canyon, Pueblo, Colorado What is calcium? When a star is on the way to converting all of its carbon and oxygen atoms into [...]
