the three main states of matter
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Solid
example 1
exmple 2
example 3
Liquid
example 1
exampe 2
example 3
Gas
example 1
example 2
example 3
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This coin is an example of a solid. Coins can be made of different materials such as copper, alloy, zinc, silver, and gold. This coin happens to be made of solid gold. It is an American Bicentennial Society Commemorative dated 1975.