👉 A fluid is a substance that takes the shape of its container and flows easily, unlike solids which have a fixed shape and structure. Liquids, the most common type of fluid, consist of molecules that are close together but not tightly packed, allowing them to slide past each other and move freely. This property enables fluids to fill any space they are placed in, take the form of their container, and exhibit viscosity, which is a measure of a fluid's resistance to flow. Examples of fluids include water, oil, and air.
