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chapter 3
tools of science
| Question | Answer |
|---|---|
| metric system | a system of measurement based on the number. |
| SI | a system of units used by scientists to measure the properties of matter |
| mass | a measure of how much matter is in an object |
| weight | a measure of the force of gravity acting on an object. |
| volume | the amount of space they matter occupies. |
| meniscus | the curved upper surface of a liquid in a column of liquid. |
| density | the measurement of how much mass of a substance in contained in a given volume. |
| estimate | an approximation of a number based on reasonable assumptions. |
| accuracy | how close a measurement is to the true or accepted value. |
| precision | how close a group of measurements are to each other. |
| significant figures | all the digits in a measurement that have been measured exactly, plus one digit whose value has been estimated. |
| percent error | a calculation used to determine how accurate, or close to the true value, an experimental value really is. |
| mean | the numerical average of a set of data |
| median | the middle number in a set of data |
| mode | the number that appears most often in a list of numbers |
| range | the difference between the greatest value an the least greatest value in a set of data. |
| anomalous data | data that do not fit with the rest of a data set. |
| graph | a picture of information from a data table; shows the relationship between variables. |
| linear graph | a line graph in which data points yield a straight line. |
| nonlinear graph | a line graph in which the data points do not fall along a straight line. |
Created by:
mia kovalchik