1. Warm-up: Update your table of contents while returning papers. Page 26 Monday August 04, 2014 Learning goal: Make accurate and precise measurements using proper significant figures when collecting and organizing data. 4 Evaluate based on A&P 3 Distinguish A&P in data 2 Importance of A&P 1 Define A&P

2. Page 26 Monday August 04, 2014 Learning goal: Make accurate and precise measurements using proper significant figures when collecting and organizing data. 4 Evaluate based on A&P 3 Distinguish A&P in data 2 Importance of A&P 1 Define A&P Learning goal: Make accurate and precise measurements using proper significant figures when collecting and organizing data. Learning scale: Student’s self-evaluation: Complete at home or at the end of class, use the 4-3-2-1-0 system of understanding Student’s self-evaluation: Complete at home or at the end of class, use the 4-3-2-1 Learning scale (two to three sentences). Homework: None 1234 Define accuracy and precision Explain the importance of accuracy and precision in science Differentiate between accuracy and precision when measuring and calculating Supporting or rejecting a hypothesis based on the accuracy and precision of data in an investigation

3. Sig fig math: 1.What time does each stop watch below show? 2. Are these times the same, or are they different? Fig 2: stopwatch B HH:MM:SS:TH 00:28:00:00 Fig 1: stopwatch A HH:MM:SS 00:28:00 Page 27 Monday August 04, 2014 Learning goal: Make accurate and precise measurements using proper significant figures when collecting and organizing data. 4 Evaluate based on A&P 3 Distinguish A&P in data 2 Importance of A&P 1 Define A&P

4. Sig fig math: 2.Are these times the same, or are they different? The times are different because they have different number of sig figs. The time on stopwatch B is more accurate and precise. 3.How many sig figs does each of the following numbers contain? a. 28.00 b. 300 c. 0.008 d. 4902 Rules to identify sig figs: 1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant. 2) ALL zeroes between non-zero numbers are ALWAYS significant. 3) ALL zeroes which are SIMULTANEOUSLY to the right of the decimal point AND at the end of the number are ALWAYS significant. 4) ALL zeroes which are to the left of a written decimal point and are in a number >= 10 are ALWAYS significant. DO NOT WRITE THESE DOWN!! Page 27 Monday August 04, 2014 Learning goal: Make accurate and precise measurements using proper significant figures when collecting and organizing data. 4 Evaluate based on A&P 3 Distinguish A&P in data 2 Importance of A&P 1 Define A&P

5. Sig fig math: 3. How many sig figs does each of the following numbers contain? a. 28.00 b. 300 c. 0.008 d. 4902 Atlantic Pacific Rule: Atlantic Pacific If a decimal point is Present, count all digits, starting with the first non-zero from left to right. If a decimal point is Absent, count all digits, starting with the first non- zero from right to left. 4 sig figs 1 sig fig Page 27 Monday August 04, 2014 Learning goal: Make accurate and precise measurements using proper significant figures when collecting and organizing data. 4 Evaluate based on A&P 3 Distinguish A&P in data 2 Importance of A&P 1 Define A&P

6. Sig fig math: 4.Multiplying and dividing with sig figs Example: 5 x 5 = 25 30 with sig fig rules Example: 5.0 x 5.0 = 25 with sig fig rules Example: 100.00 / 4.00 = 25.0 with sig fig rules Example: 100.00 / 4.0 = 25 with sig fig rules When finding the rule, look at the number of sig figs in the question and in the answer. The answer must contain the same amount of sig figs as the number in the question with the LEAST amount of sig figs. Page 27 Monday August 04, 2014 Learning goal: Make accurate and precise measurements using proper significant figures when collecting and organizing data. 4 Evaluate based on A&P 3 Distinguish A&P in data 2 Importance of A&P 1 Define A&P

7. Sig fig practice: copy and identify the proper number of sig figs Page 27 Monday August 04, 2014 Learning goal: Make accurate and precise measurements using proper significant figures when collecting and organizing data. 4 Evaluate based on A&P 3 Distinguish A&P in data 2 Importance of A&P 1 Define A&P

8. Answer the questions in complete sentences 11. Why are significant figures important when taking data in the laboratory? 12. Why are significant figures NOT important when solving problems in your math class? 13. Using two different instruments, I measured the length of my foot to be 27 centimeters and 27.00 centimeters. Explain the difference between these two measurements. 14. Explain in words, the Atlantic-Pacific Rule for finding significant figures in a number. Page 27 Monday August 04, 2014 Learning goal: Make accurate and precise measurements using proper significant figures when collecting and organizing data. 4 Evaluate based on A&P 3 Distinguish A&P in data 2 Importance of A&P 1 Define A&P