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chem quiz terms

Terms in this set (16)

Matter
material that makes up a substance and has mass and occupies space.
pure substance
-a type of matter that has a definite composition.
Element
a pure substance containing only one type of matter, which cannot be broken down by chemical methods.
Compound
a pure substance consisting of two or more elements with a definite composition, that can be broken down into simpler substances only by chemical methods.
Mixture
the physical combination of two or more substances that does not change the identities of the mixed substances.
States of matter
three forms of matter: solid, liquid, and gas
Solid
a state of matter that has its own shape and volume.
liquid
a state of matter that takes the shape of its container but has a definite volume.
Gas
a state of matter that does not have a definite shape or volume.
Physical properties
the properties that can be observed or measured without affecting the identity of a substance.
physical changes
a change in which the physical properties of a substance change but its identity stays the same.
Chemical properties
the properties that indicate the ability of a substance to change into a new substance.
Chemical changes
a change during which the original substance is converted into a new substance that has a different composition and new physical and chemical properties.
kinetic energy
the energy of moving particles.
Potential energy
a type of energy related to position or composition of a substance.
Heat
the energy associated with the motion of particles in a substance.
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