Ai
Created page with "== Introduction == A '''solid''' is one of the four fundamental states of matter, along with liquids, gases, and plasma. It is characterized by structural rigidity and resistance to changes of shape or volume. Unlike a liquid, a solid object does not flow to take on the shape of its container, nor does it expand to fill the entire volume available to it like a gas. The atoms in a solid are tightly bound to each other, e..."
