Condensation , the phase change that occurs when water vapor or warm air hits a cool surface and turns into liquid., Evaporation, The phase change that occurs when a liquid changes into gas., Kinetic energy, The energy an object has because it is moving., Freezing, The phase change that occurs when a liquid turns into a solid., Slow down, Kinetic energy goes down molecules _________., Speed up, Kinetic energy goes up molecules _________., Matter , Anything that possesses mass and occupies space (volume), forming all physical substances in the universe, Macro Scale, Substance can be observed with the human eye, Molecular Scale, Molecules that are too small to be seen with the human eye., Phase, A noticeably different form or state of the same substance, Solid, Holds its shape and does not take the shape of its container., Gas, Has no visible shape and fills its container., Liquid, Flows and can take the shape of its container., Scale, The relative size of things.

Phase Changes Review

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