Chemistry - 9/26
What makes a digit in a number significant?
How much “faith” do we have in a measurement?
All measurements consist of all known values & one estimated value
We only estimate the first digit (in a decimal) because its the only one with any real “meaning”
2 . 4 3 8 9
(Known Number) (Estimate from known number) (Estimate of an estimate = irrelevant)
Number | Significant Figures | Rounding: Low | Rounding: High | Difference |
|---|---|---|---|---|
1 | One | 0.5 | 1.4 | 0.9 |
1.0 | Two | 0.95 | 1.04 | 0.09 |
1.00 | Three | 0.995 | 1.0004 | 0.009 |
(Insert Notes from Significant Figures Video)
Possible quiz on Wednesday!! (Chemical Changes / Chemical Properties)
What makes a digit in a number significant?
How much “faith” do we have in a measurement?
All measurements consist of all known values & one estimated value
We only estimate the first digit (in a decimal) because its the only one with any real “meaning”
2 . 4 3 8 9
(Known Number) (Estimate from known number) (Estimate of an estimate = irrelevant)
Number | Significant Figures | Rounding: Low | Rounding: High | Difference |
|---|---|---|---|---|
1 | One | 0.5 | 1.4 | 0.9 |
1.0 | Two | 0.95 | 1.04 | 0.09 |
1.00 | Three | 0.995 | 1.0004 | 0.009 |
(Insert Notes from Significant Figures Video)
Possible quiz on Wednesday!! (Chemical Changes / Chemical Properties)
