Some shells were homes to living things. Other shells were not.
Properties of Shells
Shells that are not homes for living things are pushed by the ocean waves.
Animals with shells are called.
Shells that are homes to animals protect the animals from other animals that can eat them.
Shells come in all shapes and sizes. Texture is one property that shells have.
Animals that have shells are mullocks. Mullocks are sea animals that have no backbone or spine. They are invertebrates. Some examples of a mollusks that have shells are: snails, gastropods, clams, and oysters.