Significant Figures Flashcard

Front

What are significant figures?

Back

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

Front

Which digits are always significant?

Back

Non-zero digits are always significant.

Front

Are leading zeros significant?

Back

No, leading zeros are never significant.

Front

What is the significance of zeros between non-zero digits?

Back

Zeros between non-zero digits are always significant.

Front

When are trailing zeros significant?

Back

Trailing zeros are significant only if they are to the right of a decimal point.

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 the decimal portion.

Front

Round 0.90985 cm to three significant figures.

Back

0.910 cm.

Front

What is the result of 13.004 + 3.09 + 112.947 using correct significant figures?

Back

129.04.

Front

Calculate the volume of a substance with a density of 2.5 g/cm³ and mass of 100. grams.

Back

Volume = Mass/Density = 100 g / 2.5 g/cm³ = 40 cm³.

Front

What is the sum of 26.95 g and 2.05 g with correct significant figures?

Back

29.00 g.