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Lesson 1: Length

Lesson 1: Length. T. Trimpe 2008 http://sciencespot.net/. Length. The distance between two points. 1 mile. 1.6 kilometers. 1 yard = 0.9444 meters. 1 inch = 2.54 centimeters. English vs. Metric Units. Which is longer? A. 1 mile or 1 kilometer B. 1 yard or 1 meter

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Lesson 1: Length

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  1. Lesson 1: Length T. Trimpe 2008 http://sciencespot.net/

  2. Length • The distance between two points

  3. 1 mile 1.6 kilometers 1 yard = 0.9444 meters 1 inch = 2.54 centimeters English vs. Metric Units Which is longer? A. 1 mile or 1 kilometer B. 1 yard or 1 meter C. 1 inch or 1 centimeter Left Image: http://webapps.lsa.umich.edu/physics/demolab/controls/imagedemosm.aspx?picid=1167Right Image: http://share.lancealan.com/N800%20ruler.jpg

  4. We use metric measurements in science class. • Why? • Its easier to convert (m to cm vs. yards to feet) - More countries use it! Non-metric countries: USA, Myanmar, Liberia

  5. Measure Carefully and Always use Metric! http://www.cse.lehigh.edu/~gtan/bug/localCopies/marsOrbiter

  6. km Metric Units m cm mm The basic unit of length in the metric system is the meter and is represented by a lowercase m. Standard: The distance traveled by light in absolute vacuum in 1⁄299,792,458 of a second. Metric Units 1 Kilometer (km) = 1000 meters 1 Meter = 100 Centimeters (cm) 1 Meter = 1000 Millimeters (mm) Click the image to watch a short video about the meter.

  7. Try it! • How long is your paper? • In cm? • In mm? • How wide is your paper? • In cm? • In mm?

  8. 1 centimeter = 10 millimeters What is the length of the line in centimeters? _______cm What is the length of the line in millimeters? _______mm What is the length of the line to the nearest centimeter? ________cm HINT: Round to the nearest centimeter – no decimals. Measuring Length How many millimeters are in 1 centimeter? Ruler: http://www.k12math.com/math-concepts/measurement/ruler-cm.jpg

  9. Today’s lab • Measuring the distance a marble will roll on tape of differing stickiness. • Problem we will solve: • Which type of tape is the stickiest?

  10. Graphing • Title your graph (give a descriptive title!) • Title your axis • Independent variable on the bottom • Dependent variable on the side • Include units!

  11. Conclusion • Which is the stickiest tape? • Is your hypothesis supported or not? • What data did you use to support your answer to #2? • Why do we have to do five trials? • What were some sources of error? • What did you learn from this activity? How could you apply this new knowledge to your life?

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