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anything that has mass and takes up space


study of properties of matter and how matter changes

physical property

A characteristic of a pure substance that can be observed without changing it into another substance

chemical property

ability of a substance to change into different substances


basic particle that makes up an element


force of gravity on an object


measurement of how much matter an object contains


the amount of space an object takes up

volume formula

length x width x height

cubic centimeter

common unit of measuring volume of solids


the amount of matter in a given space

density formula

mass / volume

physical change

matter changes its appearance but does not change into a different substance

chemical change

produces new substances with different properties from those of the original substance

law of conservation of mass

matter is not created or destroyed in any chemical or physical reaction

thermal energy

most common form of energy released or absorbed when matter changes

endothermic change

change in which energy is taken or absorbed

exothermic change

change in which energy is released, or given off


particles are packed closely together


has fixed, closely packed arrangement of particles which results in a definite shape and volume


Has a definite volume but no shape of its own


takes the shape of its container


a substance that flows


does not have a definite shape nor a definite volume


changing states from a solid to a liquid

melting point

specific temperature at which a substance melts


change of state from a liquid to a solid


change in state from a liquid to a gas


vaporization on a liquid's surface


vaporization throughout a liquid

boiling point

certain temperature that causes a substance to boil


particles in a gas lose enough thermal energy to form a liquid


surface articles of a solid gain enough energy to become a gas and do not pass through the liquid state


common unit for measuring liquid volume


a fluid's resistance to flow

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