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 round a number to the correct number of significant figures?

Back

To round a number to the correct number of significant figures, identify the last significant figure you want to keep, look at the digit immediately to the right, and round up if it's 5 or greater, or leave it as is if it's less than 5.

Front

Calculate 131 - 122.45 and round to the correct number of significant figures.

Back

9 (rounded to 1 significant figure).

Front

What is the correct way to read a measurement from a balance?

Back

When reading a measurement from a balance, include all certain digits and one estimated digit.

Front

What is the significance of the estimated digit in a measurement?

Back

The estimated digit provides an additional level of precision to the measurement, indicating the uncertainty in the reading.

Front

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

Back

There should be 1 estimated digit.

Front

Type in the measurement on the cylinder to the correct number of significant digits: 32.5, 32.4, 32.3, 32.6.

Back

32.5 (rounded to 3 significant figures).

Front

Type in the measurement on the ruler to the correct number of significant digits: 41.6, 41.5, 41.7, 41.8.

Back

41.6 (rounded to 3 significant figures).

Front

What is the rule for adding and subtracting significant figures?

Back

When adding or subtracting, the result should be rounded to the least number of decimal places of any number in the operation.

Front

What is the rule for multiplying and dividing significant figures?

Back

When multiplying or dividing, the result should be rounded to the least number of significant figures of any number in the operation.