Science

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solid

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resistance to changes of shape or volume

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liquid

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having a consistency like that of water or oil, i.e., flowing freely but of constant volume.

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gas

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an airlike fluid substance which expands freely to fill any space available, irrespective of its quantity.

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viscosity

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the state of being thick, sticky, and semifluid in consistency, due to internal friction.

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surface tension

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is the elastic tendency of a fluid surface which makes it acquire the leastsurface area possible

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freezing

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the freezing point of water.

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melting

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make or become liquefied by heat.

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evaporation

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is a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase that is not saturated with the evaporating substance.

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physical change

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a change that alters the form or apperence of a material but does not make the material into another substance

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chemical change

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a change in which one or more substances combine or break apart to form new substances

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condestation

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water that collects as droplets on a cold surface when humid air is in contact with it.

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Sublimation

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is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.

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precipate

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cause (an event or situation, typically one that is bad or undesirable) to happen suddenly, unexpectedly, or prematurely.

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enothermic reaction

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(of a reaction or process) accompanied by or requiring the absorption of heat

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exothermic reaction

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is a chemicalreaction that releases energy by light or heat

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phase change

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. The states in which matter can exist: as a solid, liquid, or gas. When temperature changes, matter can undergo aphase change, shifting from one form to another.