👉 A substance fluid, often referred to as a liquid or a fluid state of matter, is characterized by having no fixed shape but taking the shape of its container. Unlike solids, which maintain a defined volume and shape, fluids flow easily and can move from areas of higher pressure to lower pressure. This property is due to the weak intermolecular forces between fluid molecules, allowing them to slide past each other. Common examples include water, oil, and air, which exhibit fluidity and can be poured, splashed, or flow over surfaces. The behavior of substances in the liquid state is crucial in various natural and industrial processes, from the movement of water in ecosystems to the operation of engines and cooling systems.
