Solid, Particles are tightly packed. Most of these objects can be melted to form liquids., Liquid, Particles a slightly spread out. Objects with these particles fill the bottom of whichever space they are put into., Gases, Particles are very widely spaced. We breathe these in and out., Condensation, Cooling a gas to form a liquid., Evaporation, Heating a liquid to form a gas., Freezing, Cooling a liquid to form a solid., Melting, Heating a solid to form a liquid..

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