Significant figures

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

To determine the number of significant figures, count all non-zero digits, any zeros between significant digits, and trailing zeros in a decimal number. Leading zeros are not counted.

Front

What is the significance of significant figures in scientific measurements?

Back

Significant figures indicate the precision of a measurement and help communicate the uncertainty in the data.

Front

How many significant figures are in the number 0.00456?

Back

There are 3 significant figures in 0.00456 (the digits 4, 5, and 6). Leading zeros are not counted.

Front

How many significant figures are in the number 1008 grams?

Back

There are 4 significant figures in 1008 grams.

Front

What is the correct way to express the number 0.005600 in scientific notation?

Back

The correct scientific notation for 0.005600 is 5.600 x 10^-3, which shows 4 significant figures.

Front

When adding or subtracting numbers, how do you determine the number of significant figures in the result?

Back

In addition or subtraction, the result should be reported to the least number of decimal places of any number in the operation.

Front

When multiplying or dividing numbers, how do you determine the number of significant figures in the result?

Back

In multiplication or division, the result should have the same number of significant figures as the number with the least significant figures used in the calculation.

Front

What is the reading on a graduated cylinder that shows 35.0 mL?

Back

The reading of 35.0 mL has 3 significant figures, indicating the precision of the measurement.

Front

How do you read a graduated cylinder accurately?

Back

To read a graduated cylinder accurately, observe the bottom of the meniscus at eye level and estimate one additional digit beyond the marked scale.