What is the physical state of materials? Give examples.
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Physical state of materials is the appearance of the material from outside. Its comprises of three states: Solid, Liquid and Gas. For example: Ice is in solid state and when melted it changes into water that is in liquid state and when boiled it changes into water vapor or steam which is in gaseous state.
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Physical properties refer to properties that can be observed or measured without changing the composition of the material. Examples include colour, hardness and smell and freezing, melting and boiling points. Chemical properties are discovered by observing chemical reactions.
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