How to Make a Seashell - Just Add Water!
03:27

How to Make a Seashell - Just Add Water!

Key Facts In This Video

  • 1

    Sea snails build their shells by pulling calcium and carbonate out of the surrounding water, forming solid calcium carbonate. (0:06)

  • 2

    The upper part of the ocean is saturated with calcium and carbonate, which is why it's ideal for shell-building. (1:15)

  • 3

    An excess of CO2 from the atmosphere can change the dissolving depth at which shells break apart. (2:21)

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