Accuracy and precision Worksheet

Master scientific measurement! This worksheet helps high school chemistry students grasp accuracy, precision, and percent error.

1. A measurement that closely agrees with accepted values is said to be _. accurate precise reliable significant 2. Which experiment is precise but not accurate? 1 2 3 4 3. Which experiment is the least precise? 1 2 3 4 4. A student measures the mass of one mole of carbon and finds it to be 12.22 grams. If the accepted value is 12.11 grams, what is the student's %error? 0.0091% 0.091% 0.91% 9.1% 5. Three groups of students measure the mass of a product from the same chemical reaction. The groups' recorded data are 8.83 g, 8.84 g and 8.82 g. The known mass of the product from that reaction is 8.60 g. The group values are _. accurate precise accurate precise neither accurate nor precise