1. Entrance Ticket 9/9/14 Grades are posted! We are now on entrance ticket set 2 In the white text books read about scientific notation (pp. 15 and 16). Put the following into scientific notation…. 1. 1300 m 2. 1,366 g 3. 0.0004 J 4. 602200000000000000000000 atoms

2. Measurement Booklet page 1 Use the red text books pp. 64 & 65 to help with the front cover (page 1) On the cover of your booklets (p.1) please sketch the 3 dart boards from page 64. Below the dart boards please define the following terms: -Accuracy -Precision -Error -Percent Error

3. Entrance Ticket 9/10/14 Write the following in scientific notation: 1) 23,000,000 3) 0.000005 2) 0.00203 4) 657,000,000,000 Copy this : In scientific measurement, a result can not be more precise than the least precise measurement. Therefore, we use significant figures. Homework tonight: practice parts III & IV

4. Answers Write in scientific notation: 1) 23,000,000 3) 0.000005 2) 0.00203 4) 657,000,000,000 Answers: 1) 2.3 x 10 7 3) 5 x 10 -6 2) 2.03 x 10 -3 4) 6.57 x 10 11

5. Answers Part I 1.) 7.3 x 10 3 9.) 6.23 x 10 -5 2.) 6 x 10 6 10.) 3.5 x 10 -4 3.) 2.61 x 10 2 4.) 4.23 x 10 1 5.) 2.1 x 10 4 6.) 1.6 x 10 -1 7.) 6.0 x 10 -2 8.) 2.3 x 10 -2

6. Answers Part II 1.) 2,600 9.) 0.0000765 2.) 5,100,00010.) 54,080 3.) 0.0423 4.) 0.00610 5.) 0.926 6.) 7.6 7.) 0.00380 8.) 2,110,000

7. Booklet page 2: Significant Figures Booklet page 2: Significant Figures Define significant figures on page 2. Define significant figures on page 2. On the bottom half of page 2 write down the significant figure rules for 0 and give one example for each rule. On the bottom half of page 2 write down the significant figure rules for 0 and give one example for each rule.

8. Rules for Zero Rules for Zero 0 is significant when “sandwiched” 606 1003.2 1.000006 0 is sig. when at the end of a # with a decimal 3.160 54.10 0.000500 0 is not when @ the end of a # w/o a decimal 56,000 250 825,300 0 is not when in front of a # with a decimal 0.00065 0.08 0.000000000003

9. Entrance Ticket 9/11/14 How many Significant Figures are in the following: 1) 0.062 g 5) 1020 m 2) 0.0620 g 6) 1020. m 3) 120 kg 7) 1020.00 m 4) 1,002 kg 8) 0.00000930 s 9) What would be the result of multiplying the measurements 163.25 mm by 10.2 mm?

10. Answers 1) 2 5) 3 2) 3 6) 4 3) 2 7) 6 4) 4 8) 3 9) What would be the result of multiplying the measurements 163.25 mm by 10.2 mm? 163.25 mm x 10.2 mm = 1,665.15 mm 2 Correct answer: 1,670 mm 2

11. measurement activity measurement activity Get into two groups per lab table. On today’s e.t. show your measurements and show your calculations. Get into two groups per lab table. On today’s e.t. show your measurements and show your calculations. Find the perimeter and area of your card. Pretend the card is a rectangle. Use centimeters! Find the lengths to the nearest 100 ths place (0.00)! You are going to have to look close and estimate with your eyes. Make sure to record your answers to proper precision! Find the perimeter and area of your card. Pretend the card is a rectangle. Use centimeters! Find the lengths to the nearest 100 ths place (0.00)! You are going to have to look close and estimate with your eyes. Make sure to record your answers to proper precision!

12. A nswers to Part III 1.) 36.) 3 2.) 27.) 2 3.) 28.) 3 4.) 49.) 6 5.) 110.) 1

13. A nswers to Part IV 1.) 5.0 g 2.) 6.9 g 3.) 10.1 g 4.) 232.7 g 5.) 9 g 6.) 278 m 7.) 2,610 g or 2.61x10 3 g

14. Answers to Part IV 8.) 0.569 mL or 5.69 x 10 -1 mL 9.) 36,000 or 3.6 x 10 4 mm 10.) 34 cm 2 11.) 2.0 g/mL 12.) 30. cm 3 13.) 0.3 g/cm 3

15. Answers to Part IV 14.) 1 x 10 6 m 2 or 1,000,000 m 2 15.) 5.5 x 10 2 cm 2 or 550 cm 2 16.) 1.3 mm 2 17.) 2.0 x 10 5 g/mL 18.) 2.0 g/cm 3 19.) 1.7 x 10 7 m 3

16. A nswers to Metric Conversions 1.) 3,680 g 6.) 0.25 L 2.) 5.68 m 7.) 0.6 kg 3.) 8.7 L 8.) 8.9 m 4.) 0.025 g 9.) 0.004 mm 5.) 1.01 mm 10.) 250,000 mg

17. Measurement Lab (pages 10 & 11) In the lab today make sure to measure using centimeters (cm) for length (measure to the 100 th place 0.00) In the lab today make sure to measure using centimeters (cm) for length (measure to the 100 th place 0.00) The graduated cylinder measures volume in milliliters (mL) (measure to the 10 th place 0.0) The graduated cylinder measures volume in milliliters (mL) (measure to the 10 th place 0.0)

18. Measurement Post Lab Please get out your measurement labs and your Chapter 3 booklets Please get out your measurement labs and your Chapter 3 booklets You will have 25 minutes to finish your labs, otherwise it is homework tonight. You will have 25 minutes to finish your labs, otherwise it is homework tonight. Chapter 3 quiz is on Thursday!

19. Entrance Ticket 9/17/14 *Have out CH 3 booklets and practice worksheet 1.How many milliliters (mL) is 2.67 Liters (L)? 2.How many kilograms (kg) is 3,800 grams (g) ? 3.Convert 4,500 centimeters (cm) to meters (m)? *Wait for my help for #4 and #5… 4.How many meters is 6.67 micrometers? 5.How many nanograms is 0.082 grams? * CH 3 quiz tomorrow! I will be collecting measurement labs, practice & booklets

20. Answers 1. 2,670 mL 2. 3.8 kg 3. 45 m 4. 0.00000667 m 5. 82,000,000 ng

21. Chpt. 3 quiz review 1. Put 0.0000038 into scientific notation 2. How many significant figures in 0.0060m? 3. What is 110.008mL rounded to 4 sig figs? 4. What is the product of 3.62cm x 8.1cm? 5. What is the sum of 45.870mL + 16.3mL? 6. What are accuracy, precision and error? 7. What does the prefix micro mean? 8. What is -70 °C in Kelvin? 9. Which digit is the number 1,092 rounded to?

22. Answers 1. 3.8 x 10 -6 2. 2 sig figs 3. 110.0 mL 4. 29 cm 2 5. 62.2 mL 6. Accuracy is how close a measurement is to the actual value. Precision is how close as set of measurements are to each other. Error is the difference between your measurement and the actual value. 7. Micro means 10 -6 or 1 millionth 8. 203 K 9. 1092 is rounded to the ones place, the “2”

23. Entrance Ticket 10/2/11 Please get out your measurement labs and your Chapter 3 booklets Please get out your measurement labs and your Chapter 3 booklets Write down tonight’s homework which is to read 4.1 and do problems 1-7 at the end of the section. Write down tonight’s homework which is to read 4.1 and do problems 1-7 at the end of the section.