Significant figures

Significant figures

Apply the rules of significant figures when working calculations using data recorded from measurements.

Significant figures identification

Identify the number of significant figures in measurements.

Rounding significant figures

Round measurements to the required number of significant figures.

Significant digits rule 1

Any digit that isn't zero is significant.

Significant digits rule 2

Zeros between non-zero digits are significant.

Significant digits rule 3

Zeros to the left of the first non-zero digit are not significant.

Significant digits rule 4

If a number equal to or greater than 1 has a decimal point, then all the numbers including the numbers on the right are significant.

Significant digits rule 5

If a number is smaller than 1, only the zeros that are at the end of the number and the zeros that are between non-zero digits are significant.

Significant digits rule 6

For numbers that don't have trailing decimal points, they aren't significant.

Decimal places in answers

The answer should have the same number of decimal places as the quality with the fewest number of decimal points.

Exact numbers

You don't take exact numbers into account for significant figures.

Reporting answers

Report answers to calculations to the correct number of significant figures.

Measurement

The type of unit to measure something.

Length

Meters.

Mass

Gram.

Volume

Liters.

Temperature

Celsius/Kelvin.

Weight

Newtons.

Density

g/L^3.

Density formula

Calculate the density, mass, or volume of a substance using the formula density = mass/volume.

Accuracy

Accuracy refers to the closeness of a measured value to a standard or known value.

Precision

Precision is the measured closeness to other values/comparison.

centi 

10^-2

deci

10^-1

deka

10^1

hetco

10²

formula to find mass

M= v x d

formula to find volume

Volume=m/d