1. Chapter 3 Vocabulary Measurement Scientific notation

2. Measurement a quantitative description that includes both a number and a unit Examples: Length (4 meters), age (15 years), or daily temperature (31°C)

3. Scientific Notation an expression of numbers in the form m x 10 n, where m is equal to or greater than 1 and less than 10, and n is an integer

4. Chapter 3 Vocabulary Accuracy Precision Accepted Value Experimental Value

5. Accuracy the closeness of a measurement to the true value of what is being measured

6. Precision describes the closeness, or reproducibility, of a set of measurements taken under the same conditions

8. Accepted Value a quantity used by general agreement of the scientific community, a known value Example: 0°C freezing point of water or 100°C boiling point of water

9. Experimental Value a quantitative value measured during an experiment

10. Chapter 3 Vocabulary Error Percent Error Significant Figures

11. Error the difference between the accepted value and the experimental value Error = experimental value – accepted value

12. Percent Error the percent that a measured value differs from the accepted value accepted value x 100%Percent error = |error | ____________

13. Significant Figures all the digits that can be known precisely in a measurement, plus a last estimated digit

14. Chapter 3 Vocabulary Mass Weight Volume

15. Mass a measure of the amount of matter that an object contains SI base unit of mass is the kilogram

16. Weight a force that measures the pull of gravity on a given mass

17. Volume a measure of the space occupied by a sample of matter