1 / 37

nde-ewo (pronounced enday aywo)

Thursday, September 13, 2012. nde-ewo (pronounced enday aywo). Turn in your Density Lab in the basket by the calculator caddy Get a calculator Take out a sheet of notebook paper. Express the following to the correct number of significant figures 334.54 g + 198 g 34.1 grams / 1.1 mL

deiondre
Download Presentation

nde-ewo (pronounced enday aywo)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Thursday, September 13, 2012 nde-ewo(pronounced enday aywo) • Turn in your Density Lab in the basket by the calculator caddy • Get a calculator • Take out a sheet of notebook paper • Express the following to the correct number of significant figures • 334.54 g + 198 g • 34.1 grams / 1.1 mL • 2.11 x 103 joules /34 sec • 30 000 km/24.2600 hrs • 1.45 mL – 0.0003 mL

  2. Check Yourself • 533 g • 31 g/mL • 62 joules/sec • 1000 km/hr • 1.45 mL

  3. Graphing Graphing is an important tool for expressing data so that it is easier to read and interpret Rules for graphing: --place the manipulated/independent variable (the one that was changed) on the x axis. --place the dependent/responding variable (the results of that change) on the y axis. (dry mix) DRY MIX y scale = largest y value – smallest y value x scale = largest x value – smallest x value # of lines on the y axis # of lines on the x axis The graph should cover at least ¾ of the grid

  4. Rules: • Each person will have their own paper. • Answer must be written correctly on your paper • Use appropriate units (where it applies)

  5. Question #1 • Roll the die then round to the correct number of significant figures in the following: a) 0.58742005 b) 30 024 589

  6. Question #2 • Roll the die then round to the correct number of significant figures in the following: : a) 900007.0 b) 0.20470810

  7. Question #3 • Calculate. Express your answer in the proper # of significant figures. a) 1.44 m X 2.467 m = b) 7082 ÷ 42 =

  8. Question # 4 • Calculate. Express your answer in the proper # of significant figures or decimal places. a) 7182 ÷ 52 = b) 55.46 g – 36.2 g =

  9. Question # 5 x 10 • Express in standard scientific notation. a)0.00382 b)456 3000

  10. Question # 6 • Express in normal notation. a)4.53 X 105 b)2.1 X 10-4

  11. Question #7 • Draw the metric conversion grid. ( Hint…King Henry….)

  12. Question # 8 • Calculate density. Show all steps and units. mass 537 g, volume 1002 mL

  13. Question #9 • Calculate mass. Show all steps and units. density 7g/mL, volume 222 mL

  14. Question # 10 • Calculate volume. Show all steps and units. density 3 g/mL, mass 2100 g

  15. Question # 11 • What is the difference between accuracy and precision?

  16. Question #12 • Tell if the following data is accurate, precise, both or neither. A nail has a length of 3.04 cm. Measurements recorded were: 2.01, 2.02, 2.01, 2.03

  17. Question #13 • Give the appropriate unit to measure the following: • The weight of a minivan b) The volume of gas in a car’s tank

  18. Question #14 • Give the appropriate unit to measure the following: • The length of a bar of soap • The volume of a tube of toothpaste

  19. Question # 15 Answer the following questions: • How many decigrams are in a hectogram? • How many centimeters are in a kilometer?

  20. Question # 16 The lines in the picture just touch the rim of the penny. Record the diameter of the penny in centimeters, recording the correct number of significant figures.

  21. Answers

  22. Question # 1 b) a)

  23. Question # 2 b) a)

  24. Question #3 • 3.55 m • 170

  25. Question #4 • 140 • 19.3

  26. Question #5 • 3.82 x 10 -3 • 4.563 x 10 6

  27. Question #6 • 45300 • 0.00021

  28. Question #7 k h da BASE d c m kilo hecto deka deci centi milli

  29. Question #8 D = m/V = 537 g/1002 mL= 0.536 g/mL

  30. Question #9 M = DV = (7 g/mL)(222 mL) = 2000 g

  31. Question #10 V = m/D = 2100 g/ (3 g/mL) = 700 mL

  32. Question #11 Accuracy: how close values are to the known (true) value Precision: how close values are together

  33. Question #12 Precise

  34. Question #13 • kg • L

  35. Question #14 • cm • mL

  36. Question #15 • 1000 or 103 • 100 000 or 105

  37. Question #16 1.92 cm (make sure your answer has a 100ths place value; it doesn’t have to be a 2)

More Related