Math G7 Chapter 3 Understanding Significant Figures

What are significant figures?

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

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

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

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

How many significant figures are in the number 0.0045?

• 4

• 1

• 2

• 3

Round 0.00789 to two significant figures.

• 0.007

• 0.0079

• 0.008

• 0.0078

What is the rule for counting significant figures in zeros?

• Zeros are never significant.

• All zeros are significant regardless of their position.

• Only leading zeros are significant.

• Zeros are significant if they are between non-zero digits or after a decimal point following a non-zero digit.

How many significant figures are in 1002?

• 4

• 5

• 2

• 3

Is the number 0.03040 considered to have significant figures? If so, how many?

• 5

• 3

• 2

• 4

What is the result of adding 12.11 and 0.3 in terms of significant figures?

• 12.0

• 12.4

• 12.5

• 12.1

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

• Count only the non-zero digits.

• Only consider the first digit of the measurement.

• Count all non-zero digits, zeros between them, and trailing zeros in decimal numbers.

• Ignore all zeros in the measurement.

If a number has trailing zeros without a decimal point, how are they treated?

• Trailing zeros are always ignored.

• Trailing zeros are significant and indicate precision.

• Trailing zeros indicate the number is rounded.

• Trailing zeros are only significant in scientific notation.

Why are significant figures important in scientific measurements?

• Significant figures are irrelevant to scientific accuracy.

• Significant figures are only important in chemistry.

• Significant figures are important because they convey the precision of scientific measurements.

• Significant figures are used to make measurements easier to read.