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Chapter 1
Question | Answer |
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Scientific Method | A method of investigation in which a problem is first identified and observations, experiments, or other relevant data are then used to construct or test hypotheses that purport to solve it. |
Hypothesis | An educated guess or assumption. |
Independant Variable | Factor that can be varied or manipulated in an experiment (e.g. time, temperature, concentration, etc). It is usually what will affect the dependent variable. |
Dependant Variable | What you measure in the experiment and what is affected during the experiment. The dependent variable responds to the independent variable. |
Experimental Control | Experimental control is a group of experimental subjects that is not exposed to a chemical or treatment being investigated so that it can be compared with experimental groups that are exposed to the chemical or treatment. |
Density | Mass per unit volume. |
Percent Error | A measure of how innaccurate a measurement is, standardized to how large the measurement is. Found by the formula (measured value-actual value)/actual value*100%. |
Significant Figures | The digits of the decimal form of a number beginning with the leftmost nonzero digit and extending to the right to include all digits warranted by the accuracy of measuring devices used to obtain the numbers. |