Significant Figures and Measurement

Front

What are significant figures?

Back

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

How do you determine the number of significant figures in a measurement?

Back

Count all non-zero digits, any zeros between them, and trailing zeros in a decimal number. Leading zeros are not counted.

Front

What is the purpose of using significant figures in measurements?

Back

Significant figures convey the precision of a measurement and help avoid overestimating the accuracy of the data.

Front

What is the rule for addition and subtraction with significant figures?

Back

The result should be rounded to the least number of decimal places of any number in the operation.

Front

What is the rule for multiplication and division with significant figures?

Back

The result should be rounded to the least number of significant figures of any number in the operation.

Front

What is the estimated digit in a measurement?

Back

The estimated digit is the last digit in a measurement that is not known with certainty, often indicated by a slight guess based on the measurement tool.

Front

How should you read a graduated cylinder?

Back

Read the bottom of the meniscus at eye level to the appropriate precision, including one estimated digit.

Front

What is the correct way to report a measurement of 0.00456 m?

Back

The correct way to report this measurement is 4.56 x 10^-3 m, which shows the significant figures clearly.

Front

What is the significance of the meniscus in liquid measurement?

Back

The meniscus is the curve at the surface of a liquid in a container, and it is important to read the measurement at the bottom of this curve.

Front

If a thermometer reads 57.4 °C, how many significant figures does this measurement have?

Back

This measurement has four significant figures.