A liquid is a nearly incompressible fluid that
conforms to the shape of its container but
retains a (nearly) constant volume
independent of pressure. 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 made up of tiny
vibrating particles of matter, such as atoms,
held together by intermolecular bonds. Water
is, by far, the most common liquid on Earth.
Like a gas, a liquid is able to flow and take
the shape of a container. Most liquids resist
compression, although others can be
compressed. Unlike a gas, a liquid does not
disperse to fill every space of a container, and
maintains a fairly constant density. A
distinctive property of the liquid state is
surface tension , leading to wetting
phenomena.
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