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Measurement and Estimation Length / Distance

Measurement and Estimation Length / Distance. MCOM 520 Ryan Connors. History of Measurement. What is measurement?. The English System of Measurement – Length/Distance. How do we measure length and distance in the English System? Inch, Foot, Yard, Mile

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Measurement and Estimation Length / Distance

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  1. Measurement and EstimationLength / Distance MCOM 520 Ryan Connors

  2. History of Measurement • What is measurement?

  3. The English System of Measurement – Length/Distance • How do we measure length and distance in the English System? • Inch, Foot, Yard, Mile • There are 3 feet in a yard, and 5,280 feet in a mile. How many yards are in a mile? • The answer is 5,280/3 = 1,760 yards • If a football field is 100 yards and there are 1,760 yards in a mile, how many football fields are in a mile? • The answer is 1,760/100 = 17.6 football fields

  4. The Metric System of Measurement – Length/Distance • Who uses this form of measurement? • What are some examples of units of distance in the Metric System? • Units of measure in the Metric System are based on one unit of measure • Length is based on the meter • The meter is around 3 feet

  5. Metric System - Length • Millimeter – “milli” means Thousandth • So a millimeter is actually 1 meter/1000. • Centimeter – “centi” means Hundredth • So, a centimeter is actually 1 meter/100. • Decimeter – “deci” means Tenth • So, a decimeter is actually 1 meter/10 • Decameter – “deca” means Ten • So a decameter is actually 1 meter X 10 • Hectometer – “hecto” means One Hundred • So, a hectometer is actually 1 meter X 100 • Kilometer - “kilo” means One Thousand • So a kilometer is actually 1 meter X 1000 http://school.discoveryeducation.com/clipart/clip/thinkingcapwhoa_color.html

  6. Metric System - Length • How many millimeters are in a kilometer? • There are 1,000 millimeters in a meter, and a kilometer is 1,000 meters. So, the answer is 1000 X 1000 = 1,000,000 millimeters • How many centimeters are in a kilometer? • There are 100 centimeters in a meter, and a kilometer is 1,000 meters. So the answer is 100 X 1000 = 100,000 centimeters

  7. How wide is the tennis ball in centimeters? The answer – the left side of the ball appears to start at 50 centimeters. The right side of the ball seems to end at 57 centimeters. 57-50 = 7 centimeters! Bonus question: Can you figure out how many tennis balls would equal a meter? Metric Measurement http://www.phys.selu.edu/rhett/plab194/tennis-1.jpg

  8. Estimation • What is estimation? • Educated guess – Webster’s dictionary describes an educated guess as “a guess based on knowledge and experience, making it more likely to be correct”

  9. Keyboard Estimation Exercise • Take out your paper rulers! • Which side is centimeters? • Which side is inches?

  10. Keyboard Estimation Exercise • Measure the first three keys on the top left hand corner of the main section of keys on your keyboards. (~, 1, 2) in centimeters and inches. • Enter the values into the corresponding columns on your worksheets

  11. Keyboard Estimation Exercise • Can you estimate the length of your keyboards? • Enter the estimated total length of your keyboards in the corresponding columns on your worksheets

  12. Summary • The English system of length measurement uses theinch, foot, yard and mile. • The Metric system of length is based on themeter.It uses themillimeter, centimeter, decimeter, decameter, hectometer, and the kilometer. • We can use estimation to gain knowledge about the size of objects when we have limited resources to measure

  13. Please complete the worksheet for the remainder of the class!

  14. Citations • Scientific Method and Measurement. United Learning(1993). Retrieved March 4, 2008, from unitedstreaming: http://streaming.discoveryeducation.com • Discovering Math: Measurement (Grades 3-5). Discovery Channel School(2005). Retrieved March 4, 2008, from unitedstreaming: http://streaming.discoveryeducation.com/ • Worm on ruler image: http://school.discoveryeducation.com/clipart/clip/inchworm.html

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