1. Accuracy and Precision Lab Unit 1 Day 7 Sept 18/19, 2012

2. Do Now (put in your notes for today) Done? Silently read the lab directions for today Convert the following numbers to Scientific Notation: 405000 0.00923 23 0.00002003 679.02 Convert the following to Regular Notation: 2.33 x 10 -4 8.09 x 10 5 8.1001 x 10 -2 6.00 x 10 9 9.0889 x 10 0

3. Do Now (in your notes) Match each definition below with the correct word on the right. 1.the red diamond on the chemical diamond, this symbol 2.easily evaporated 3.what you use to clean up an acid spill 4.the degree of exactness of a measurement that is repeatedly recorded. 5.a measure of how close a value is to the true value 6.what you use to protect your eyes during lab a.Volatile b.Precision c.Flammable d.Goggles e.Accuracy f.weak base or baking soda

4. Today’s Objective SWBAT compare and contrast precision and accuracy. SWBAT give examples of precision and accuracy.

5. A1 Announcements The following people need to make up Do Nows: – Jackie – Leobardo – Chris

6. A2 Announcements The following people need to make up Do Nows: – Vanessa Sarmiento

7. A3 Announcements The following people need to make up Do Nows: – Daniela – Vanessa

8. B1 Announcements The following people need to make up Do Nows:

9. B2 Announcements The following people need to make up Do Nows: – Carolina

10. B3 Announcements The following people need to make up Do Nows: – Alex G. – Berenice

11. Page 1 Lab Write Up Directions – Stapled/taped/glued

12. Page 2 Table of Contents Title Date Accuracy and Precision Lab 9/13/12

13. Page 3 I: Title – Accuracy and Precision Lab II: Purpose - …. Copy from handout III: Hypothesis - …. Your best guess IV: Materials – …leave blank for now V: Procedure – Refer to Accuracy and Precision Lab handout provided by Ms. O’Neil

14. Page 3 VI: Data Collection TrialLength (cm)% error 1 2 3 4 5 6 7 8 Average

15. Page 3/4 VII: Assigned Questions (answer in complete sentences) – 1. Were your numbers accurate? Why do you think so? – 2. Were your numbers precise? Why do you think so? – 3. If you were to do this again, do you believe your numbers would be more accurate or more precise? Why?

16. Page 3/4 VIII: Conclusion - …

17. A2 – Only Procedure 1 Take out a piece of paper and tear into 8 pieces.