1. Scientific Notation

2. Example 1: 1000

3. Example 2: 0.001

4. Example 3: 5.6 x 10 3

5. 1)0.00045 1)3.4 x 10 -5 You Try

6. Accuracy and Precision How do you define these terms?

7. Accuracy How close measurements are to the true/accepted value.

8. Precision How close measurements are to each other. These measurements are not necessarily accurate.

9. Percent Error How much error you have in your lab measurements. Comparison between your experimental value/measurement to the true/accepted value. % Error =(True – Experimental/True)x 100

10. Percent Error Practice Problems 1) True value = 21.2g, Measured value = 17.7g 2) True value = 4.15ml, Measured value = 4.26 ml.