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B3 U1 L1-6
book 3 unit 1
Term | Definition |
---|---|
matter | anything with mass that takes up space |
mass | amount of matter in an object |
weight | measure of gravitational force on an object |
volume | the amount of space an object occupies |
density | mass in a given volume |
physical property | can be observed without changing substance identity |
chemical property | the ability of a substance to change identity |
physical change | change affecting physical properties |
chemical change | one or more substances change into a different substance |
law of conservation of mass | mass cannot be created or destroyed |
atom | smallest unit of an element with same properties as that element |
element | one or more of combined atoms |
compound | different kinds of atoms combined |
mixture | variety of atoms combined |
pure substance | substance with definite phys. and chem. properties |
heterogeneous | mixture without a uniform composition |
homogeneous | mixture with uniform composition |
solid | has definite volume and shape |
liquid | has definite volume but no definite shape |
gas | has no definite volume or shape |
freezing | change from liquid to solid |
melting | change from solid to liquid |
evaporating | change from liquid to gas |
boiling | rapid change from liquid to gas |
condensation | change from gas to liquid |
sublimation | change from solid directly into a gas |
deposition | change from gas directly to a solid |