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Rolling

why do we get seasick
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Why Do We Get Seasick?

Why Do We Get Seasick? Seasickness is a disagreeable illness that is caused by the pitching and rolling motion of a ship at sea. It is a for

how is glass made
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How Is Glass Made?

Ordinary glass is made from clean, white sand and two white, powdery chemicals known as soda and lime. Just plain sand can be made into glas