Video: Why seashells are tougher than chalk

Why seashells are tougher than chalk (video)
Credit: The American Chemical Society

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

Yet seashells are tough and resilient.

In this video, Reactions explains why seashells are so different, and why you can't use them to draw on your driveway:

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Citation: Video: Why seashells are tougher than chalk (2018, June 7) retrieved 23 July 2019 from
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