Practice: Read the length of the metal bar to the correct number of significant figures.
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| Accuracy & Precision |
Significant Figures are used to discuss the level of precision in any measurement.
Recording Measurements
Concept #1: The more significant figures in a measurement then the more precise it is.
Example #1: Determine the number of significant figures involved in measuring the length of the pencil.
a) 2 cm
b) 2.0 cm
c) 2.6 cm
d) 3 cm
Practice: What is the correct reading for the liquid in the burette provided below?
Progress
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Videos in Significant Figures: Precision in Measurements
Concept #1: Significant Figures Precision Concept
Example #1: Significant Figures Precision Example
Practice #1: Significant Figures Precision Practice 1
Practice #2: Significant Figures Precision Practice 2
Additional Problems
Read the water level with the correct number of significant figures.
A) 5 mL
B) 5.4 mL
C) 5.42 mL
D) 5.420 mL
E) 5.4200 mL
Read the length of the metal bar with the correct number of significant figures.A) 20 cmB) 15 cmC) 15.1 cmD) 15.10 cmE) 15.100 cm
Read each measurement to the correct number of significant figures. Note: Laboratory glassware should always be read from the bottom of the meniscus. Digital balances normally display mass to the correct number of significant figures for that particular balance.
Read each measurement to the correct number of significant figures. Note: Laboratory glassware should always be read from the bottom of the meniscus. Digital balances normally display mass to the correct number of significant figures for that particular balance.
Read each measurement to the correct number of significant figures. Note: Laboratory glassware should always be read from the bottom of the meniscus. Digital balances normally display mass to the correct number of significant figures for that particular balance.
(b) An oven thermometer with a circular scale reading degrees Fahrenheit is shown. What temperature does the scale indicate? How many significant figures are in the measurement? [Section 1.5]
You have a graduated cylinder that contains a liquid (see photograph). Write the volume of the liquid, in milliliters, using the proper number of significant figures.
What is the correct reading for the liquid in this burette?(A) 32.2 mL(B) 32 mL(C) 32.26 mL(D) 33.74 mL
Which measurement is correct when using a 30-cm ruler with 0.1 cm markings? a) 10.1 cm b) -0.05 cm c) 5.225 cmd) 3.45 cm e) 29 cm