CH03 – Significant Figures

Dates

• P4 – Friday, January 12th
• P5 – Tuesday, January 15th
• P7 – Tuesday, January 16th

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!

Textbook Work

• Chapter 1 (27 – 34)

Homework

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