Significant Figures (aka sig figs)

Significant Figures(aka sig figs)

Sig Figs • Significant Figures – the reliable digits in a measurement based on the precision of the device • In other words, the MORE sig figs it has the more PRECISE the number is

Why are Sig Figs important? • Let’s say I measured the area of the basketball court. Trial 1: Estimate by walking: About 15m wide by 26m long - Area is about 390m2 Trial 2: Actually measure: 15.24m wide by 25.60m long - Area is 390.1 m2

Sig Fig Rules

Part 1: Sig Fig Rules Notes • How many sig figs do each of the following numbers have?

Part 1: Sig Fig Rules Group Practice • How many sig figs do each of the following numbers have?

Part 1: Sig Fig Rules Individual Practice • How many sig figs do each of the following numbers have?

Part 2: Rounding to Sig Figs • Getting rid of extra sig figs: Round to the appropriate sig fig Example: Round 12259 to have four (4) sig figs 12260

Rounding to Sig Figs 2) Need more sig figs: Add zeroes to the end of the number. Example: Write 0.23 with four (4) sig figs 0.2300

Part 2: Rounding Notes • Write each of the following numbers with 2 sig figs.

Part 2: Rounding Group Practice • Write each of the following numbers with 3 sig figs.

Part 2: Rounding Individual Practice • Write each of the following numbers with 3 sig figs.

Significant Figures (aka sig figs)