Melting, Solid changes directly into a liquid., Freezing, Liquid changes into a solid., Evaporation, Liquid changes into a gas., Condensation, Gas changes into a liquid., Sublimation, Solid changes directly into a gas., Deposition, Gas changes directly into a solid., Melting, Ice turning into liquid water., Condensation, Water vapor forming droplets on the outside of a cold glass., Sublimation, Dry ice changing directly into carbon dioxide gas., Aristotle, Proposed the idea that matter is composed of four basic elements: earth, water, air, and fire., Democritus, Proposed that matter is made of tiny, indivisible particles called atomos., Plasma, A state of matter made up of highly energized, charged particles., Solid, Has a definite shape and definite volume., Liquid, Has a definite volume but takes the shape of its container., Gas, Has neither a definite shape nor a definite volume.

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