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www.reference.com/article/matter-mean-443c7c28f45bc54e

Matter is anything that physically takes up space and has mass. More specifically, anything that is made up of atoms is considered matter, which is everything.

www.reference.com/article/matter-made-8219b3e3d29d89df

Matter is made of single particles called atoms and is any substance that has either mass or volume. Matter can exist in three states, either as a solid, a liquid or a gas.

www.reference.com/article/matter-change-15fd0c630e5c37cd

Matter changes via two processes: a physical change or a chemical change. Physical changes retain the fundamental identity of a substance without modifying its composition, while chemical changes alter matter into another form having a set of different properties from t...

www.reference.com/article/organic-matter-e156a6875f01652e

Organic matter is composed of the remains of animals and plants and the waste products the organisms leave in the environment. Unlike organic material, organic matter has decomposed to the point that it is resistant to decomposition. This matter is decomposed into a hum...

www.reference.com/article/air-matter-5e7ddcdd1d16c8f

Air is composed of matter. Air is gas, so it is composed of molecules that are spread far apart from each other.

www.reference.com/article/examples-matter-a049e3d4c2d0fa6f

All physical objects, such as stars, books, people, animals, plants and the sea, are examples of matter. Matter is any physical object that occupies space and has mass.

www.reference.com/article/three-states-matter-12341882d1263ebd

The three states of matter are solid, liquid and gas. Each state of matter is defined by physical characteristics such as its shape, volume and compressibility. Changing from one state of matter into another is accomplished by altering the temperature, pressure or compo...