Solid, Liquid, and Gas

Solid, liquid, and gas are the three states of matter that most substances can exist in. Each of these states has unique characteristics that distinguish them from one another.

Solid
A solid is a state of matter that has a definite shape and volume. The molecules in a solid are tightly packed together in a fixed pattern, which makes it difficult for them to move around. This is why solids maintain their shape and volume even when they are not in a container.

Liquid
A liquid is a state of matter that has a definite volume but no definite shape. The molecules in a liquid are still tightly packed together, but they are not fixed in a pattern. This allows the molecules to move around more freely than in a solid, which is why liquids can take the shape of their container.

Gas
A gas is a state of matter that has no definite shape or volume. The molecules in a gas are very far apart and move around freely. This is why gases can expand to fill any container they are in.

Summary
In summary, solids have a definite shape and volume, liquids have a definite volume but no definite shape, and gases have no definite shape or volume. These states of matter are determined by the arrangement and movement of their molecules.