A liquid is one of the three main states of matter, alongside solids and gases. Liquids have a definite volume but take the shape of their container. This means that if you pour water into a glass, it will fill the glass but still remain water. Common examples of liquids include water, juice, and oil. Liquids are made up of tiny particles that are close together but can move freely. This allows them to flow easily, which is why you can spill a drink. The ability of liquids to flow and take the shape of their container is what makes them unique and essential in our daily lives.