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What is this? The Kinetic Theory of Matter is when all particles are in constant, random motion.

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{Fact}: The speed at which molecules move depends on temperature. This may determine whether the substance stays in solid, liquid, or gaseous form.

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{Fact}: Solids have both definite shape and definite volume. Liquids only have definite volume, and gases have neither of the two.

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Ask yourself: How do the molecules interact with each other in different states?
The molecules behave differently in each phase. For solids, molecules are compressed together as well as organized. Liquids are slightly spread apart, which allows them to fit into small spaces. Gases fill the space around them, and they do so randomly.

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What is this? A phase of matter is a way that matter can exist, such as solids, liquids, gases, and plasma

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Ask yourself: What is needed to change from one physical state to the next?
Temperature - Heat warms solids, which then make liquids and liquids to gases. Then, the cold turns gases into liquids and liquids into solids.

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{Liquid}: By definition, a liquid is part of the four main states of matter where molecules can freely migrate to different locations. Their molecules have no fixed [definite] shape, but they do have a fixed [definite] volume.

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{Gas}: By definition, a gas is part of the four main states of matter where the molecules can freely migrate to different locations. The molecules have neither a fixed [definite] shape, nor volume.

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{Plasma}: By definition, plasma is a part of the four main states of matter. The molecules are gaseous, yet lack electrons, and they are very hot versions of gas.

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{Solid}: By definition, a solid is part of the four main states of matter where the molecules vibrate against each other in fixed positions and cannot migrate to different locations in the substance. Unlike gas, liquid or plasma, solids have fixed [definite] shape and volume.

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If these two laws are combined, the combined gas law has been created. It states that higher volume equals lower pressure, and higher temperature equals higher pressure.

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{Sublimation}: The phase change that goes from a solid to a gas, much like dry ice.

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{Boyle's Law}: Boyle's Law states that a volume of a gas is invertly proportional.
{Charles' Law}: Charles' Law states that a volume of a gas is directly proportional.

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What is this? Heat of fusion is when there is a change in enthalpy resulting in heat to a specific quantity, and turning a solid into a liquid at constant pressure.

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{Vaporization}: The phase changes from a liquid to a gas from either evaporation [surface phenomenon] or boiling [bulk phenomenon].

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{Condensation}: The phase changes from a gas to a liquid, often seen on cold water bottles or bathroom mirrors after a shower.

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{Melting}: The phase changes from a solid to a liquid by absorbing heat energy, while the molecules move farther apart as well as speed up to create more and more heat.

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{Endothermic Reactions}: Endothermic reactions absorb heat and cool the surrounding areas.
{Exothermic Reactions}: Exothermic reactions release heat and warm the surrounding areas.

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{Freezing}: The phase changes from a liquid to a solid, by slowing molecules down due to a change in temperature.

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{Deposition}: The phase changes from a gas to a solid, much like frost on vehicles.