Measurement Errors with Percentages

The students measured length during a science experiment, they got 12 cm. But the actual measurement was 14.25 cm. What was the percent error?

• 15.79%

• 18.75%

• 2.25%

• 18%

Ms. Perun estimates the weight of her cat, Pumpkin, to be 8 pounds. The actual weight of Pumpkin was 10 pounds. (Black can be very slimming.) Find the percent error.

• 15%

• 20%

• 25%

• 30%

The difference between an experimental value and an accepted value

• graph
• density
• percent error
• error

The ratio of an error to an accepted value

• percent error
• error
• precision
• accuracy

Density was calculated in an experiment and was found to be 86 g/cm³. The actual density was 78 g/cm³. What is the percent error?

• 12%

• 10%

• 8%

• 6g/mL

The density of a block was calculated to be 50 g/ml. The actual density of the block was 55 g/ml. What is the percent error?

• 9%

• -9 g/mL

• 10%

• -10 g/mL

Heather performs an experiment to measure the acceleration of an object due to Earth’s gravitational force and discovers the acceleration of an object is 10.91 m/s. The actual acceleration of the object is 9.80 m/s. What is Heather’s percent error?

• 0.11%

• 1.11%

• 11.33%

• 10.17 m/s

Arlo performs an experiment for his physical science class and finds that the gravitational acceleration due to the Earth is 9.0 m/s². The actual value is 9.8 m/s². What is the percent error in Arlo’s measurement?

• 8.2%

• -8.2%

• -9.0m/s²

• 9.4%

A student’s calculation was found to have a 35.5% error, and his experimental measurement was 15.6 cm. What are the possible values for the actual measurement?

• 5.538 cm

• 21.138 cm

• 10.062 cm

• 51.1 cm