Scientific Measurements

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 part.

Front

How many significant figures are in the number 0.007500?

Back

4 significant figures.

Front

Round the number 0.004578 to two significant figures.

Back

0.0046.

Front

How many significant figures are in the number 0.0045?

Back

2 significant figures.

Front

What is the SI base unit of length?

Back

Meter.

Front

What is the rule for counting significant figures in whole numbers?

Back

In whole numbers, only non-zero digits are significant. Leading zeros are not significant.

Front

What is the rule for counting significant figures in decimal numbers?

Back

In decimal numbers, all digits after the first non-zero digit are significant.

Front

How do you round a number to a specific number of significant figures?

Back

Look at the digit immediately after the last significant figure you want. If it's 5 or more, round up the last significant figure.

Front

What is the result of 78.467 divided by 3, rounded to the correct significant figures?

Back

30.

Front

What is the difference between precision and accuracy?

Back

Precision refers to how close measurements are to each other, while accuracy refers to how close a measurement is to the true value.