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E-Day 10 (Apr 23)

Page history last edited by Jay 14 years, 12 months ago

OBECTIVES:  After today's lesson students should be able to...

  • solve problems using dimensional analysis

 

CLASS LESSON

  1. Students assess each other's work on the following questions (assigned yesterday).  Each problem should show:  (a) all "equivalency's" written outhow students  (using at least two steps) in class:
    1. How many hours in 3 years?
    2. How many kilograms in 13 teaspoons?
    3. How many calories in 1 pound of protein?
    4. How many grams in 13 stones?
    5. How many Joules in 1 pound of fat?
    6. How many hours in 2.7 centuries?
    7. How many mg does 23 pounds of paper weight?
    8. How many Joules in 79 grams of fat (lipid)?
      • Following questions require more than 2 steps 
    9. How many ounces are there in 321 teaspoons?
    10. 51 kilograms are how many stones?
    11. If I run 12 miles, how many pounds of fat will I use up (ie. burn)?
    12. [Use at least 4 steps to find...]  How many seconds are in 0.7 centuries?
  2. Students should make a "concept map" in which they map the units they recorded in class last day.
    • This will lead students to see "paths" of units they can use to "travel" from one unit to another unit
    • Map should be interconnecting as much as possible
    • Adding one extra equivalency (1 mile = 8 minutes) will enable students to connect ALL of the units in one map!
    • g is a problem because there are g CHO, g protein, g fat.  I had students use "g" as the basic unit and note that there can be different sub-categories of g and each subcategory has a specific Calorie content.
  3. Students complete "The Digitatsu of Prima Numero" ... the invented units - due next class.  Students-note that this handout is slightly different than the handout in class.  Please download and use this new one!

 

[Next day we will introduce and explore metric prefixes which the kids are more familiar with.  The goal is that after this training students will be able to use "dimensional analysis" with metric units and not simply run the decimal up and down to find new numbers.

 

 

ASSIGNMENT:  Complete assignment as describe above in purple highlight.  Please pay special attention to text in orange if any is found above.

 

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