Liquids are one of the three main states of matter, alongside solids and gases. They have a definite volume but take the shape of their container. This means that when you pour water into a glass, it fills the glass but doesn't have a fixed shape. Common examples of liquids include water, juice, and oil. Liquids are made up of tiny particles that are close together but can move around freely. This movement allows liquids to flow easily, which is why you can spill milk or soda if you're not careful. The ability to flow and take the shape of their container makes liquids essential for many everyday activities.