Understanding Significant Figures

What are significant figures?

• Significant figures are the total number of digits in a number.

• Significant figures are only the whole numbers in a measurement.

• Significant figures are the digits that are always zero in a number.

• Significant figures are the digits in a number that represent its precision.

How many significant figures are in the number 0.00456?

• 5

• 3

• 4

• 2

Which of the following has the most significant figures: 100, 100.0, or 1.00?

• 100.0

• 10.0

• 0.01

• 1000

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

• The result should have the same number of significant figures as the largest number.

• The result should have the same number of decimal places as the number with the fewest decimal places.

• The result should have one more decimal place than the number with the most decimal places.

• You can ignore decimal places when adding numbers.

What is the rule for significant figures when multiplying two numbers?

• The result has the same number of decimal places as the factor with the most decimal places.

• The result has one more significant figure than the factor with the least significant figures.

• The result has the same number of significant figures as the factor with the least significant figures.

• The result should always have three significant figures regardless of the factors.

How many significant figures are in the measurement 2500 m if it is known to be precise?

• 4

• 3

• 2

• 1

If a measurement is recorded as 3.00 kg, how many significant figures does it have?

• 4 significant figures

• 1 significant figure

• 3 significant figures

• 2 significant figures

What is the significance of trailing zeros in a whole number?

• Trailing zeros represent the number's position in a sequence.

• Trailing zeros are used to denote negative values.

• Trailing zeros signify the number's divisibility by powers of 10.

• Trailing zeros indicate the number is a prime number.

How do you round a number to three significant figures?

• Identify the first three non-zero digits and round accordingly.

• Only consider the last three digits of the number.

• Round to the nearest whole number.

• Keep all digits after the decimal point.

Why is it important to use significant figures in scientific calculations?

• Significant figures are used to make calculations easier.

• It is important to use significant figures to accurately represent the precision of measurements and calculations.

• Using significant figures is optional in scientific work.

• Significant figures are only necessary for whole numbers.