👉 Fluid, in its various forms, refers to substances that can flow and change shape without breaking apart, unlike solids which maintain a fixed structure. Liquids are characterized by their ability to flow and take the shape of their container, while gases expand to fill any space they occupy, taking on the shape of their surroundings. This fluidity arises from the weak intermolecular forces between fluid molecules, allowing them to slide past each other easily. Examples of fluids include water, oil, and air, each exhibiting unique properties based on their molecular composition and density.
