Liquid
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Liquid is a state of matter with a definite volume but no fixed shape. When confined in a container and subjected to a force such as gravity, liquids will adapt to the internal shape of the container
The formation of a spherical droplet of liquid water minimizes the surface area, which is the natural result of surface tension in liquids.
Cavitation in water from a boat propeller
Surface waves in water
A lava lamp contains two immiscible liquids (a molten wax and a watery solution) which add movement due to convection. In addition to the top surface, surfaces also form between the liquids, requiring a tension breaker to recombine the wax droplets at the bottom.
Supercritical fluid
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A supercritical fluid is a substance at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist, but below the pressure required to compress it into a so
Figure 2. Carbon dioxide density-pressure phase diagram
A black smoker, a type of hydrothermal vent