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28 terms
Terms | Definitions |
|---|---|
 submicroscopic | the realm of atoms and molecules, where objects are smaller than can be detected by optical microscopes |
| chemistry | the study of the composition of matter and the changes that matter undergoes |
| matter | that which has mass and occupies space |
| basic research | research dedicated to the discovery of the fundamental workings of nature |
| applied research | research dedicated to the development of useful products and processes |
| science | an organized way of gathering and analyzing evidence about the natural world |
| scientific hypothesis | is a testable assumption, or guess, often used to explain an observed phonomenon |
| control test | a test performed by scientists to increase the conclusiveness of an experimental test |
| theory | an explanation using an integrated set of principles that organizes and predicts observations. |
| mass | the amount of matter in an object. |
| weight | a measure of the gravitational force exerted on an object |
| volume | the amount of space an object takes up |
| energy | the capacity to do work |
| potential energy | stored energy |
| kinetic energy | energy due to motion |
| temperature | a measure of how hot (or cold) something is; specifically, a measure of the average kinetic energy of the particles in an object |
| thermometer | measuring instrument for measuring temperature |
| absolute zero | The coldest temperature, 0 Kelvin, that can be reached. It is the hypothetical temperature at which all molecular motion stops. |
| heat | the energy transferred between objects that are at different temperatures |
| solid | matter that has definite volume and definite shape |
| liquid | a form of matter that flows, has constant volume, and takes the shape of its container |
| gas | a form of matter that does not have a definite volume or shape |
| melting | change from a solid to a liquid |
| freezing | the change of state from a liquid to a solid |
| evaporation | the change of a substance from a liquid to a gas |
| boiling | evaporation in which bubbles form beneath the liquid surface |
| condensation | The change of state from a gas to a liquid |
| density | the ratio of an object"s mass to its volume |
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