Review: Measurement

How close a measurement is to the true value is the _______________ of the measurement.

• accuracy

• precision

• uncertainty

• reliability

How close the series of measurements are to one another is the _______________ of the measurement.

• precision

• accuracy

• validity

• reliability

Is the following sentence true or false? To decide whether a measurement has good precision or poor precision, the measurement must be made more than once.

• True

• False

On a dartboard, darts that are closest to the bull’s-eye have been thrown with the greatest accuracy. On the second target, which arrangement of three darts represents lower precision but higher accuracy than the darts on the first target?

• Three darts close to the bull’s-eye but not grouped together

• Three darts far from the bull’s-eye and not grouped together

• Three darts far from the bull’s-eye and grouped together

• Three darts close to the bull’s-eye and grouped together

The meaning of “accepted value” with respect to an experimental measurement is:

• the value that is generally considered to be the right answer

• the value obtained from a single experiment

• the value that is always the highest measured

• the value that is always the lowest measured

Complete the following sentence. For an experimental measurement, the experimental value minus the accepted value is called the ________________________________________________________.

• error

• average

• sum

• product

What range of temperature would be considered accurate if the three degree guarantee is 70 +/- 3 °C?

• 67 °C to 73 °C

• 70 °C to 73 °C

• 66 °C to 72 °C

• 68 °C to 72 °C

11. 10.0 ml is a better measurement than 10 ml because:

• it shows greater precision in measurement.

• it uses fewer significant figures.

• it is a larger volume.

• it is easier to write.

What is the volume of water in the graduated cylinder?

• 44.8 ml

• 45 ml

• 55.2 ml

• 44.80 ml

__________________ __________________ is a measurement that includes all of the digits that are known, plus a last digit that is estimated.

• A significant figure

• A random error

• A base unit

• A derived quantity