Objects that take up space and have mass. - Matter, How heavy something is without gravity. - Mass, The amount of space inside a 3-D object. How much an object holds. - Volume, The smallest unit of matter. Every solid, liquid, and gas is made up of atoms. - Atom, 2 or more different materials that can be easily separated. When these materials are combined they do not lose their identifying characteristics. (Ex. trail mix or salad.) - Mixture, 2 or more different materials that cannot be separated once combined which creates a new substance. (Ex. sugar water) - Solution, Substances dissolve or appear to disappear when they mix with water creating a see-through liquid. - Dissolve, Water which collects as droplets on a cold surface when humid air is in contact with it. - Condensation, The process by which a liquid turns into a gas. - Evaporation, When a liquid turns into a solid when the temperature is lowered below its freezing point. Freezing point= 32 degrees Fahrenheit - Freezing, When a substance changes from a solid to a liquid, typically by the addition of heat. - Melting,

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