1) Jenny wants to cut circular discs with a diameter of 10.0 cm. The five discs cut have the diameters 9.3 cm, 9.5 cm, 9.4 cm, 9.3 cm and 9.4 cm. Which option describes her results? a) Accurate and precise b) Accurate but not precise c) Not accurate and not precise d) Not accurate but precise 2) Which diagram shows a precise but inaccurate result? a) b) c) d) 3) What can a scientist do to increase the accuracy of the experiment? Select all the applies. a) Repeat the experiment multiple times. b) Fake the data collected. c) Change the measuring instrument used. d) Use measuring instruments correctly. 4) Human reaction time can cause inaccuracies in stopwatch time recordings. This is an example of a/an __________________? a) Consistent/systematic error b) Unpredictable/random error 5) Which two steps can we take to reduce the inaccuracies from unpredictable errors (e.g., human reaction time)?  a) Repeat the experiment multiple times. b) Use a more accurate stopwatch. c) Have different people use the same stopwatch. d) Calculate the average of multiple readings. 6) What type of error is represented in the diagram? a) Parallax error b) Zero error 7) Zero errors are a type of consistent error. Which of the following diagram shows a weighing scale with no zero error. a) b) c) 8) A spring balance with no weights attached currently shows 20 g. A weight of 100 g is then attached to the spring balance. What value will the spring balance show? a) 20 g b) 80 g c) 100 g d) 120 g

Accuracy, Precision, and Errors

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