CP03 – Sig Figs

Date

• Friday, January 12th

Class Business

• Fall Semester Final Exam commentary
• Questions about grades?

Activity Recap

• Comments about measurement?
• What was challenging about acvtivity?

New Idea – Terms

• Precision
• Accuracy
• Error
• Uncertainty
• (you can LOOK IT UP!)

New Idea – Measurement & Significant Figures

• all measurements contain uncertainty
• all numbers are measurements
• so how do we deal with this?
• SIGNIFICANT FIGURES
• all certain digits and one good guess
• YES, all numbers contain a GUESS
• Hint: scientific notation helps!

Examples

• Chapter 2 Paired Exercises (5 – 12)

Homework

• Finish textbook work
• NOTE: pencil on paper, space work
• SHOW: given info and some indication of process
• DO NOT just write the answer