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matter
anything that takes up space and has mass
mass
the amount of matter in an object
weight
the force of gravity acting on the matter in an object
pure substance
a material made of only one kind of element or compound(is not a mixture)
element
a pure substance that consists of atoms with the same atomic number
compound
a pure substance consisting of atoms of two or more different elements that are chemically combined
heterogeneous mixture
does not have a uniform appearance since the substance is unevenly distributed
homogeneous mixture
when different substances are mixed so that they have a uniform appearance throughout
viscosity
a measure of a fluid’s resistance to flowing
physical change
any change in matter that does not alter the composition of a substance
chemical change
changes that alter the chemical composition of a substance
melting
solid to liquid
freezing
liquid to solid
melting point
the temperature at which a solid turns to a liquid
vaporization
liquid to gas
evaporation
slow form of vaporization
boiling
faster form of vaporization
boiling point
the temperature at which a substance boils
condensation
gas to liquid
sublimation
solid to gas
deposition
gas to solid
physical property
anything about a substance that can be observed or measured without altering the substance’s chemical composition
chemical property
describes how a substances changes in the presence of another substance under certain conditions