Phase changes, A physical change of a substance from one state to another , Atom, Tiny particles that are the basic building blocks of all matter. Consists of protons,neutrons and electrons. , Thermal Energy, Heat energy , Kinetic energy, Energy of motion , Temperature, This DOES NOT CHANGE DURING a phase change, Solid, State of matter where molecules are tightly packed together in a regular pattern. Molecules can vibrate in a limited area Definite shape volume; low compressibility, low fluidity, Liquid, State of matter where molecules are loosely packed and can easily flow past each other. Definite volume, indefinite shape; low compressibility., Gas, high State fluidity. of matter where molecules are spread far apart and are flying m all directions. Indefinite shape and volume; High fluidity and high compressibility., Fluidity, Something's ability to flow, Compressibility, The ability to force something into less space, Freezing, Liquid to solid, Melting, Solid to liquid, Vaporization, When a liquid changes to a gas; there are two types of this phase change: Evaporation & Boiling , Evaporation, Liquid to gas; usually occurs on the surface and can happen below the boiling point , Boiling, Liquid to a gas; happens throughout the entire liquid once the has reached a certain temperature, Condensation, Gas to a liquid , Sublimation, solid directly to a gas , Solidifacation, gas directly to a solid , Boiling point, The temperature at which a liquid changes to a gas., Melting point, The temperature at which a solid changes to a liquid, Freezing point, The temperature at which a liquid changes to a solid, Dew point, The temperature at which a gas changes to a liquid, Water vapor, The gas state of water, Conservation of mass, Matter can neither be created nor destroyed. The mass of an object never changes, no matter how the parts are rearranged.

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