Scientific Notation

Example 1: 1000

Example 2: 0.001

Example 3: 5.6 x 10 3

1) )3.4 x You Try

Accuracy and Precision How do you define these terms?

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

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

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

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