👉 A fluid is a substance that takes the shape of its container while maintaining a constant volume, unlike solids which have a fixed shape and volume. Fluids consist of molecules that are in constant motion, colliding with each other and the walls of their container. This movement allows fluids to flow and fill any space, making them capable of moving from areas of higher pressure to lower pressure. Common examples of fluids include water, oil, air, and blood. Fluids play a crucial role in many natural processes and human activities, from the movement of tectonic plates to the functioning of engines and hydraulic systems.
