Reading measurements correctly using sig figs

How many estimated digits should there be when reading a measurement from a piece of lab equipment?

• 0
• 1
• 2
• 3

A student correctly reads a thermometer as 37.9^oC. Which one of these would still be a correct reading from another student?

• 37.8

• 40.0

• 38.9

Which of the following choices best represents the length reading from the metric ruler pictured?

• 87 mm

• 87.4 mm

• 87.40 mm

• 87.400 mm

Which of the following choices best represents the length reading from the metric ruler pictured?

• 0.8 cm

• 0.80 cm

• 0.800 cm

• 8 cm

Which of the following choices best represents the length reading from the metric ruler pictured?

• 8.5 cm

• 8.45 cm

• 8.450 cm

• 8 cm

Which of the following choices best represents the volume reading from the graduated cylinder pictured?

• 61 mL

• 61.5 mL

• 67 mL

• 67.0 mL

Type in the measurement on the graduated cylinder to the correct number of significant digits. No unit.

• 6.300

• 6.3

• 6.32

• 7.70

Read the graduated cylinder

• 76.0

• 76.15

• 71.9

Type in the measurement on the ruler to the correct number of significant digits. No unit.

• 41.6

• 41

• 42

• 41.50

This refers to how close the measurement is to the true or accepted value

• estimate
• accuracy
• precision
• mean