A solid has a definite volume a definite shape. The particles in a solid are packed tightly together . Particles in a solid move by vibrating back and forth slightly. Amorphous solids soften before melting. The particles in this type of solid are not arranged in regular pattern. Amorphous solids don't have a distinct melting point. Crystalline solids have adistinct pattern and melting point.
Liquids have no shape of their own. A liquid takes the shape of its container. Without a container liquids spread into a wide, shallow puddle. The volume of a liquid does not change. Viscosity is a term used to describe a liquids resistance to flow. Some liquids flow easier than others because the particles in liquids with low viscosity are spread further apart.
Gases can change volume very easily. The container determines the volume and shape of a gas. The movement of gas particles could be described asspreading apart quickly.
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