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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 |