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Which best describes why a liquid needs a container when a solid does not?

Solids fill their containers, and liquids have definite shapes.
Solids have definite shapes, and liquids fill their containers.
Solids particles will expand to fill their containers, and liquid particles will expand as well.
Solids particles expand to fill their containers, and liquid particles do not.

1 answer

The best description is:

Solids have definite shapes, and liquids fill their containers.

This statement accurately reflects the behavior of solids and liquids: solids maintain their shape and do not need a container to hold their form, while liquids take the shape of their container and do not have a definite shape of their own.