👉 Fluid and liquid are both substances that take the shape of their container but differ fundamentally in their molecular structure and behavior. Liquids have molecules that are closely packed but can move past one another, allowing them to flow and take the shape of their container. They have a definite volume but no definite shape. In contrast, fluids (which include liquids and gases) also have molecules that can move freely relative to each other, but unlike liquids, they do not retain a definite shape or volume. Instead, they flow smoothly and fill any container they are placed in, taking the shape of the container but maintaining a constant volume. This difference in molecular behavior leads to distinct properties and uses for each state of matter, with liquids being more commonly used in everyday applications due to their ability to flow and fill spaces.
