As the temperature increases, the increased vibrations of the molecules causes distances between the molecules to increase. They are able to move around one another freely, resulting in a limited degree of particle mobility. Liquid particles are bound firmly but not rigidly. These properties make a liquid suitable for applications such as hydraulics. Unlike a gas, a liquid is nearly incompressible, meaning that it occupies nearly a constant volume over a wide range of pressures it does not generally expand to fill available space in a container but forms its own surface, and it may not always mix readily with another liquid. If liquid is placed in a bag, it can be squeezed into any shape. A liquid can flow, assume the shape of a container, and, if placed in a sealed container, will distribute applied pressure evenly to every surface in the container. Ī liquid, like a gas, displays the properties of a fluid. The forces that bind the molecules together in a solid are only temporary in a liquid, allowing a liquid to flow while a solid remains rigid. Unlike a solid, the molecules in a liquid have a much greater freedom to move. Liquid is one of the four primary states of matter, with the others being solid, gas and plasma. Thermal image of a sink full of hot water with cold water being added, showing how the hot and the cold water flow into each other. Most known matter in the universe is in gaseous form (with traces of detectable solid matter) as interstellar clouds or in plasma from within stars. Although liquid water is abundant on Earth, this state of matter is actually the least common in the known universe, because liquids require a relatively narrow temperature/pressure range to exist. On the other hand, as liquids and gases share the ability to flow, they are both called fluids. Therefore, liquid and solid are both termed condensed matter. The density of a liquid is usually close to that of a solid, and much higher than in a gas. Water is, by far, the most common liquid on Earth. A distinctive property of the liquid state is surface tension, leading to wetting phenomena. Unlike a gas, a liquid does not disperse to fill every space of a container, and maintains a fairly constant density. Most liquids resist compression, although others can be compressed. Like a gas, a liquid is able to flow and take the shape of a container. A liquid is made up of tiny vibrating particles of matter, such as atoms, held together by intermolecular bonds. As such, it is one of the four fundamental states of matter (the others being solid, gas, and plasma), and is the only state with a definite volume but no fixed shape. A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure.

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