States of matter: In physics

In physics, a state of matter or phase of matter is one of the distinct forms in which matter can exist. Four states of matter are observable in everyday life: solid, liquid, gas, and plasma. Learn about the four main states of matter (solid, liquid, gas, and plasma) and how they differ in particle arrangement and movement. Explore the types and characteristics of phase changes (such as melting, boiling, and sublimation) and how temperature and pressure affect them. States of Matter Matter can be classified as solid, liquid and gas on the basis of interparticle forces and the arrangement of particles. These three forms of matter are interconvertible by increasing or decreasing pressure and temperature. For example, ice can be converted from solid to a liquid by increasing the temperature. Here is a look at the states of matter, their properties, and the names of phase transitions between them. States of matter describe the physical forms that matter can take based on particle energy and arrangement. The four classical states are solid, liquid, gas, and plasma.