Which state of matter has a definite volume but no definite shape?

The state of matter that has a definite volume but no definite shape is the liquid state. In liquids, the particles are closely packed together, which allows them to maintain a fixed volume. However, the particles are not arranged in a rigid structure as they are in solids; instead, they can move past each other freely. This ability of the particles to flow gives liquids their characteristic of taking the shape of the container they are in, resulting in no definite shape.

Understanding this concept is crucial in differentiating between the various states of matter. Solids have a definite shape and volume due to their fixed and tightly packed particles. Gases, on the other hand, have neither a definite shape nor a definite volume because their particles are far apart and move freely. Plasma consists of highly energized, ionized particles and also does not have a definite shape or volume. Therefore, the defining characteristics of liquids as having a definite volume and taking the shape of their container make them unique among the states of matter.