Accuracy and Precision in Measurements

If the known mass of an object is 2.5 grams, which of the following measurements is most accurate?

• 2.49 g

• 2.75 g

•  

  0.26 g

• 4.29 g

Which data set is  most precise?

• 2.49 g     4.50 g     3.75 g

• 1.75 g       1.72 g       1.79 g

• 150 g        75 g          1.75 g

In science, good measurements are ____

• accurate

• precise

• both of these

What is the length of the nail (cm)?

• 2 cm

• About 2.5 cm

• 2.2 cm

What is the length (cm) of the nail with this ruler?

• 2.1 cm

• 2.2 cm

• about 2.1 cm

• 2.15 cm

The more digits there are, the more______ the measurement?

• accurate

• precise

True or False?

There is some uncertainty in every measurement.

• True

• False

True or False?

The precision of a measurement is limited by the markings on the measuring device.

• True

• False

What type(s) of numbers have infinite precision?

• counting numbers only

• defined values only
  (like 1 dozen = 1 exactly 12)

• Both of these

• Neither of these

The bulls eye on the left represents 

• accurate and precise

• precise but not accurate

• accurate but not precise

• not accurate and not precise

Tags

NGSS.MS-PS3-1