| A | B |
|---|
| chemistry | study of matter and its changes |
| matter | anything that has mass and takes up space |
| mass | measurement of the amount of matter |
| weight | measurement of the amount of matter and the effect of Earth's gravitational pull on it |
| scientific method | systematic approach to solving problems |
| qualitative data | inforamtion that describes a physical characteristic |
| quantitative data | numerical information - measurements or counts |
| hypothesis | a testable explanation |
| experiment | a controlled way to test a hypothesis |
| independent variable | the factor in an experiment that is purposefully changed |
| dependent variable | the factor in an experiment that happens in response to the other variable |
| control | a standard used for comparison |
| conclusion | a judgement based on information obtained in an experiment |
| model | a visual, verbal or mathematical explanation of experimental data |
| theory | an explanation that is supported by many experiments |
| scientific law | a statement of a natural phenomenon with no explanations offered |
| pure research | seeking knowledge for the sake of knowledge itself |
| applied research | seeking knowledge to solve a specific problem |
| technology | practical use of information |
| base unit | defined unit of measurement that is based on an object |
| second | SI base unit for time |
| meter | SI base unit for length |
| kilogram | SI base unit for mass |
| derived unit | unit that is defined by the combination of two or more other units |
| volume | the space occupied by an object |
| liter | SI base unit for volume |
| density | a derived unit that describes how closely packed an object's particles are |
| scientific notation | a way of expressing very large or very small numbers |
| accuracy | how close a measured value is to the "real" value |
| precision | how close a series of measurements are to each other |
| percent error | an expression of the accuracy of experimental data |
| significant figures | reported digits in a measurement |
| graph | visual display of data |
