Describe the state of matter characterized by a definite shape and volume.

The state of matter characterized by a definite shape and volume is the solid state. In solids, particles are closely packed together in a fixed arrangement, which gives them a structured form and prevents them from flowing freely like liquids or gases. This strong intermolecular force keeps the particles in place, resulting in a rigid structure that maintains its shape regardless of the container it is in.

In contrast, liquids have a definite volume but take the shape of their container, meaning they do not have a fixed shape. Gases, on the other hand, neither have a definite shape nor a fixed volume; they expand to fill whatever space is available. Plasma, a state that occurs at extremely high temperatures when gas becomes ionized, also does not have a definite shape or volume. Therefore, the defining characteristics of solids align perfectly with the description of having a definite shape and volume.