Scientific Measurements

Front

What is a significant figure?

Back

A significant figure is a digit in a number that contributes to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal part.

Front

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

Back

To round a number to a specific number of significant figures, look at the digit immediately after the last significant figure you want to keep. If it's 5 or more, round up the last significant figure. If it's less than 5, keep the last significant figure as is.

Front

Calculate and round: 78.467 / 3

Back

26.2

Front

What is density?

Back

Density is the mass of a substance divided by its volume, usually expressed in grams per milliliter (g/mL) or kilograms per cubic meter (kg/m³).

Front

Calculate the density of a substance with a volume of 5.0 mL and a mass of 45.3 g.

Back

9.06 g/mL

Front

How do you round 12,678.56 to four significant figures?

Back

12,680

Front

How many significant figures are in the number 10.005?

Back

5

Front

What is the formula for calculating density?

Back

Density = Mass / Volume

Front

Calculate and round: 4.5 + 12,340

Back

12,345

Front

What is the importance of significant figures in scientific measurements?

Back

Significant figures indicate the precision of a measurement and help communicate the uncertainty in the data.