Biochemistry Student Westminster Mara Pessoa AKA surfgirl ashley, AKA karina kelly da nobrega
Significant Figures (aka sig figs)
description
Transcript of 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 Figs1) 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 Figs2) 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.