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The Teachings of 5.1 & 5.3

Chemistry. The Teachings of 5.1 & 5.3. Period 4 Group 3. Scientific Notation. Used as shorthand Units very essential Measurements w/ units. Example. 5.53 x 10 -4 .000553 Solution: .000553. Scientific Notation & Units. Simplified form to write

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The Teachings of 5.1 & 5.3

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  1. Chemistry The Teachings of 5.1 & 5.3 Period 4 Group 3

  2. Scientific Notation • Used as shorthand • Units very essential • Measurements w/ units

  3. Example 5.53 x 10 -4 .000553 Solution: .000553

  4. Scientific Notation & Units • Simplified form to write • Units help describe measurements • All about accuracy!

  5. Step-by-step how to do Scientific Notation • 1. write number in standard notation • 2. add decimal point after the last digit • 3. move decimal point to the left until you only have on digit in front of it. • 4. cross out the zeros at the end • 5. Re-write the number as decimal x 10^x (x = # of times you moved the decimal to the left)

  6. Scientific Notation

  7. Units sandbag

  8. Units • Tells the scale of measurements • Common Scientific Units e.g. English lbs. oz. ft. in. Metric g. kg. cm.

  9. Example Question: What kind of units does the English system use? Solution: The English system use units such as pounds, ounces, cups, inches, and miles

  10. Measurements • Lengths - SI unit of length is meter. • Volume - amount of 3-dimensional space occupied by a substance. • Mass - quantity of matter present in an object.

  11. Example Question: Why would a person choose a smaller units to measure an object, rather than larger units? Solution: By choosing smaller units to measure and objects, you are much more accurate with your results. Therefore, you have less errors.

  12. Length

  13. Length • Can be measured in SI, English, or Metric units.

  14. Volume • SI unit is m3 • Volume measure how much something can hold.

  15. Mass • Metric unit is gram • SI fundamental unit is kilogram

  16. Problem Solving • Help solve equations • Convert units • Be systematic

  17. Example Anna, Zach, and Steven made 60 brownies together. Anna made 18 and put sprinkles on 1/6 of them. Zach made twice as many brownies as Anna and put sprinkles on ¼ of them. Steven made 1/3 as many brownies as Anna and put sprinkles on all of them. How many brownies had sprinkles?

  18. Solution Anna – 3 brownies with sprinkles Zach – 9 brownies with sprinkles Steven – 6 brownies with sprinkles 18 brownies had sprinkles

  19. Problem Solving • Ask questions suck as: - Where? - What do we know? - How do we get there? - Does it make sense?

  20. Conversion Factor • Def: ration of 2 parts of equation that shows relationship • Unit x conversion factor = unit2

  21. Conversion Factor • How to • Find equivalence statement that relates 2 units • Choose conversion factor • Multiply original quantity by conversion factor • Make sure you have correct # of significant figures • Ex: how do you convert from unit to another? • Solution:

  22. Quiz Questions: 1. Solve & write in scientific notation. 5,000,000 x 4000 2. For what use would you apply units in daily life? 3. What units are most appropriate to measure long distances, such as city distances? 4.Vicky decided to hike a 12 mile trail through the Hills. She began her hike at 9:20 in the morning. After Vicky traveled 1/3 of the distance she looked at her clock and it was 10:05 AM. If she continues to walk at that pace, what time will she finish? 5. Convert into inches A box is 62 cm. 1 in. = 2.54 cm

  23. Quiz Answers: • 20,000,000,000  2.0 x 1010 • You would use units in daily life to cook up a recipe, fill up gas, pay the bills, and chemistry homework. • Miles • 11:35 • 24 inches

  24. Links • http://www.coolmath.com/prealgebra/02-decimals/images/decimals01-3.gif • http://image.versiontracker.com/scrnsht/54391/174782/16Scientific_Notation_Screenshot.png • http://www.avertdisasters.org/images/publicdocs/HomeFloodCntrl/home8b~1.gif • http://gnomecoder.files.wordpress.com/2007/09/gnome-screen-ruler.png • http://www.clker.com/cliparts/f/f/4/4/121617897960609915lemmling_2D_cartoon_elephant.svg.hi.png • http://openclipart.org/people/lemmling/lemmling_Simple_cartoon_mouse.png

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