Matter, States of
Matter is anything that has mass and takes up space. The term refers to all real objects in the natural world, such as marbles, rocks, ice crystals, oxygen gas, water, hair, and cabbage. The term states of matter refers to the four physical forms in which matter can occur: solid, liquid, gaseous, and plasma.
The kinetic theory of matter
Our understanding of the nature of matter is based on certain assumptions about the particles of which matter is composed and the properties of those particles. This understanding is summarized in the kinetic theory of matter.
According to the kinetic theory of...
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