the physical forms in which all matter naturally exists on Earth, most commonly as a solid, liquid or gas

form of matter that has its own definite shape and volume

a form of matter that flows, has constant volume, and takes the shape of its container

a characteristic that can be observed or measured without changing the sample's composition

properties dependent on the amount of substance present

properties independent of the amount of substance present

the ability of a substance to combine with or change into one or more other substances

a change which alters a substance without changing its composition

a transition of matter from one state to another

a process that involves one or more substances changing into new substances, also called a chemical reaction

mass is neither created nor destroyed during a chemical reaction-it is conserved

a combination of two or more pure substances in which each pure substance retains its individual chemical properties

a mixture that does not blend smoothly throughout and in which substances remain distinct

a mixture that has constant composition throughout

homogeneous mixtures

a technique that uses a porous barrier to separate a solid from a liquid

a separation technique that is based on differences in the boiling points of the substances involved

a pure substance that cannot be separated into simpler substances

organized the elements into a grid of horizontal rows called periods and vertical columns called groups or families

made up of two or more different elements that are combined chemically