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)

(Insert Notes from Significant Figures Video)

• Possible quiz on Wednesday!! (Chemical Changes / Chemical Properties)