Page 24 Monday August 03, 2015

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1 Page Monday August 0, 05 Convert with-in the metric system Practice: How many. Practice: How many.. Centimeters in a meter?. Grams in Kilogram?. Liters in Kiloliter?. Meters in Kilometer? 5. Millimeters in a meter?. 00 Centimeters in a meter.,000 Grams in Kilogram.,000 Liters in Kiloliter.,000 Meters in Kilometer 5.,000 Millimeters in a meter 6. Millimeters in Centimeter? 6. 0 Millimeters in Centimeter 7. Kilograms in a gram? 8. Kilometers in meter? Kilograms in a gram Kilometers in meter 9. Centimeters in Kilometer? 9. 00,000 Centimeters in Kilometer 0. Milliliters in a liter? 0.,000 Milliliters in a liter All the conversions are in units of 0. in of

2 Page Monday August 0, 05 Conversion practice 685 km = m 0 ml = L 8 g = kg L = ml 000 L = kl 00 cm = m km = m 80 mg = kg m = mm in of

3 Page Monday August 0, 05 Significant figures Digits in a number are significant when they contribute meaningful information to the precision of a measure. Consider two measurements, A and B shown below.. How many digits (or figures) does each measurement have?. How many digits in each measurement are significant?. Explain which measurement is more precise. Measurement A: kg Measurement B: g Prepare a brief but complete answer for each question. in of

4 Warm-up: Please explain how 6=65. Page 5 Tues-Wed August 0-05, 05 in of

5 Page 6 Tues-Wed August 0-05, 05 Significant figures Digits in a number are significant when they contribute meaningful information to the precision of a measure. Kahn Academy: While watching the lecture, copy each figure (number) that is discussed and indicate the number of significant digits it contains. After the film, try to write a list of rules that summarizes you know if digits in a number are significant or not. in of

6 Page 6 Tues-Wed August 0-05, 05 Sig fig math:. 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.. Rules to identify sig figs: ) ALL non-zero numbers (,,,,5,6,7,8,9) are ALWAYS significant. ) ALL zeroes between non-zero numbers are ALWAYS significant. ) ALL zeroes which are SIMULTANEOUSLY to the right of the decimal point AND at the end of the number are ALWAYS significant. ) ALL zeroes which are to the left of a written decimal point and are in a number >= 0 are ALWAYS significant. DO NOT WRITE THESE DOWN!! in of

7 Page 6 Tues-Wed August 0-05, 05. Rules to identify Sig Figs Number Rule Example Nonzero integers Always significant 6. m ( sig figs) Leading zeroes Never significant m ( sig figs) Captive zeroes Always significant 6.00 (5 sig figs) Trailing zeroes Significant if after a decimal 600 ( sig figs) (5 sig figs) Exact numbers Infinite significance e.g. There is star at the center of our solar system. There is no doubt about the number "" Scientific notation All digits are significant 6.00 x 0 6 (5 sig figs) in of

8 Page 7 Tues-Wed August 0-05, 05. Rules to identify Sig Figs: Atlantic Pacific Rule Pacific If a decimal point is Present, count all digits, starting with the first non-zero, to the left of the decimal, from left to right. Count all digits after the decimal. Examples: x 0 6 Atlantic If a decimal point is Absent, count all digits, starting with the first nonzero from right to left. in of

9 Page 7 Tues-Wed August 0-05, 05 Sig fig math:. Multiplying and dividing with sig figs Example: 5 x 5 = 5 0 with sig fig rules Example: 5.0 x 5.0 = 5 with sig fig rules Example: /.00 = 5.0 with sig fig rules Example: /.0 = 5 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. in of

10 Page 7 Tues-Wed August 0-05, 05 Sig fig practice: copy and identify the proper number of sig figs in of

11 Page 7 Tues-Wed August 0-05, 05 Answer the questions in complete sentences. Why are significant figures important when taking in the laboratory?. Why are significant figures NOT important when solving problems in your math class?. Using two different instruments, I measured the length of my foot to be 7 centimeters and 7.00 centimeters. Explain the difference between these two measurements.. Explain in words, the Atlantic-Pacific Rule for finding significant figures in a number. in of

12 Page 8 Tues-Wed August 0-05, 05 Sig fig measurements: Using a graduated cylinder in of

13 Page 8 Tues-Wed August 0-05, 05 Sig fig measurements: Using a triple beam balance in of

14 Page 9 Tues-Wed August 0-05, 05 Complete the Wingspan lab. Labs will be due Friday August 0, at the start of class. The lab will be pasted on page 8 after it is graded. in of