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15 Cards in this Set

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compound
made from 2 or more elements chemically combined
mixtures
a material made up of two or more substances that CAN be separated by physical means
substance
either an element or a compund (pure things you can't take apart)
heterogeneous mixture
a material in which different materials can be easily distinguished (by sight/microscope)
solutions
a mixture in which different materials dissolve; do not scatter light; dont settle
homogeneous mixture
material where two or more substances are evenly mixed
colloids
heterogemeous mixture that never settles; particles scatter light (Tyndall effect)
suspensions
heterogeneous mixture containing a liquid in which particles settle
physical property
any characteristic of a material that you can observe, without changing the identity of the material
physical change
change in size, shape, color weight, change in state
chemical property
characteristic of a substance that indicates whether it can undergo a certain chemical change
chemical change
the change of one substance to another type of substance
law of conservation of mass
the mass of all substances present before a chemical change equals the mass of all substances remaining after the change
atom
unit that makes up all matter
element
all atoms in a sample of matter that have the same identity