Measurement and Significant Figures Flashcard

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 number?

Back

Count all non-zero digits, any zeros between them, and trailing zeros in a decimal number. Leading zeros are not counted.

Front

Which of the following has 3 significant figures: 0.0045, 0.045, 0.450, 04.5?

Back

0.450 has 3 significant figures.

Front

Back

Front

Which of the following does not have 2 significant figures: 0.020, 2.0, 0.0020, 20?

Back

2.0 has 2 significant figures.

Front

How many significant figures are in the number 120.00?

Back

There are 5 significant figures in 120.00.

Front

How many significant figures are in the number 200.0?

Back

There are 4 significant figures in 200.0.

Front

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

Back

Trailing zeros in a decimal number are significant because they indicate precision.

Front

What is the rule for zeros in whole numbers without a decimal point?

Back

In whole numbers without a decimal point, trailing zeros are not considered significant.

Front

How do you express a number in scientific notation?

Back

To express a number in scientific notation, write it as a product of a number between 1 and 10 and a power of 10.