Good Afternoon! Today is Tuesday, September 15, 2015 HW Due: None Do-Now: Please write three sentences describing what you think “significant figures”

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Presentation transcript:

Good Afternoon! Today is Tuesday, September 15, 2015 HW Due: None Do-Now: Please write three sentences describing what you think “significant figures” means. If you have not heard of it before, take a guess as to what it might mean.

Significant Figures Helps to show how precise a numerical measurement is There are a few rules of thumb when determining the number of significant figures in a number

Significant Figures 1.Non-zero numbers and zeros between non-zero numbers are significant ,503

Significant Figures 2. Leading zeros, or zeros before non-zero numbers are not significant

Significant Figures 3. Trailing zeros, or zeros after the last not-zero number can be tricky. a. If there is a decimal, the trailing zeros are significant. b. If there is not a decimal, the trailing zeros are not significant. 2,

Practice with Significant Figures 1.4, ,000, , ,

Homework Complete “Determining Significant Figures #1-14” for tomorrow Be sure to turn in Syllabus Agreements and Lab Safety Contracts