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Video: Why seashells are tougher than chalk
(PHYSorg.com Chemistry)

7 june 2018 17:47:58

Video: Why seashells are tougher than chalk
(PHYSorg.com Chemistry)

Seashells are made mostly of calcium carbonate, also known as chalk, a mineral soft and crumbly enough to use for sidewalk doodles.

22 viewsCategory: Science > Chemistry

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