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                                                                    Lindsey Petersheim
                              Compare/Contrast Lesson
Topic:  Comparing and Contrasting the English Measurement System and the Metric Measurement System.
Grade Level:  8^th Grade
Curriculum Standards: Students will develop an understanding of measurement by comparing and contrasting two different systems of measurement.  (NJCCS 4.9)
Concepts:
1.  Information about the English System of Measurement:

1. Short distances based on the human body:

                                                               i.      Inch represents the width of a thumb

                                                             ii.      Foot originally the length of a human foot

                                                            iii.      Yard is the distance from the nose to the end of the middle finger of an outstretched hand

2. Mile originally 1,000 “paces” (left and right step)—roughly 5,000 feet
3. Pound is made of 16 ounces, a system originally developed by merchants
4. Gallon was originally the volume of eight pounds of wheat

                                                               i.      Today’s volume system as both dry and liquid units, with dry being 1/6 larger than corresponding liquid units

     2.   Information about the Metric System:

1. Designed during the French Revolution to bring order to conflicting traditional systems of measurement

                                                               i.      Systems of measurement were different not only from country to country, but also region to region

2. The system replaces all traditional units other than units of time and angle measurement and all satisfy these conditions:

                                                               i.      Only one unit is defined for each quantity

                                                             ii.      Larger/Smaller units created by adding prefixes to names of defined terms

                                                            iii.      The units are defined rationally and are related to each other rationally

3. Meter = One Ten Millionth of the distance from the Equator to the north pole
4. Liter = Volume of one cubic decimeter
5. Kilogram = Weight of a liter of pure water

      3.    Metric Units

6. Meter—unit of length
7. Kilogram—unit of mass
8. Liter—unit of volume
9. Celsius Degree—unit of temperature

4. Metric Prefixes
   1. 1,000,000—mega-
   2. 1,000—kilo-
   3. 100—hecto-
   4. 10—deka-
   5. .1—deci-
   6. .01—centi-
   7. .001—milli-
   8. .000001—micro-
5. Approximate Comparison of the two systems
   1. 1 yard = .9 meters
   2. 1 mile = 1.5 kilometers
   3. 1 pound = .5 kilogram
   4. 1 quart = .95 liter

Criteria:

The two systems are to be compared on:

·        How the systems were originally developed

·        Organization of each system

·        How different units of measure are related to each other

·        What units of measure are based on

·        How different units of measure are named

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