How are seashells formed?
Seashells are the external skeletons of sea creatures called mollusks. Mollusks include creatures such as scallops, oysters and sea snails. Shells support their soft bodies and protect them from their predators and the environment. The shell is formed mostly from crystals of calcium. Some shells have chambers that can be filled with water or air, and allow the owner to float or sink as required.
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Saturday, January 5, 2008
How are seashells formed?
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