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Metric System Measurement

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Title: Metric System Measurement


1
Metric System Measurement
2
Bell Ringer
  • The Metric Conversion Act of 1975 determined that
    the metric system would be the system of
    measurement used for US Trade Commerce. Why do
    you believe this act was passed?

3
History of the Metric System
  • After the French Revolution, Louis XVI put a
    group of scientists to create a unified system of
    measurement.
  • The SI System gives credit to the French because
    it stands for
  • Systeme International
    dunites

4
Length
  • Length is the distance between 2 objects
  • A meter stick measures length

5
Mass
  • Amount of matter in an object
  • Mass is measured with a triple beam balance
  • Grams is the basic unit of mass
  • Weight is not Mass because weight is affected by
    gravity.

6
Volume
  • Is the amount of space an object
  • occupies
  • If its a solid cm3. If its a liquid mL
  • Solid Calculate LxWxH
  • Liquid Grad. Cylinder
  • Practice Problem

7
Todays Bell Ringer
  • By saying a particular substance is more dense or
    less dense, what does this imply?
  • Write down an example of two substances and
    compare their densities.

8
Density
  • Heaviness of objects. Compare a rock to a
    crumbled piece of paper. The rock is more dense
    than the paper.
  • Formula for Density Mass/Volume
  • Practice Problem Calculate the density in g/mL
    of aluminum if a 50 mL block weighs135 g.

9
Temperature
  • Measure of the average kinetic energy of the
    particles in a sample of matter
  • Measured in Celsius, Use a thermometer
  • Therm heat, meter measure
  • Convert 75 degrees Fahrenheit to Celsius
  • 5/9(degrees in Fahrenheit 32)

10
Conversion Factor
  • Start with whats given
  • Find a conversion factor
  • Numerator (unit that matches answer)
  • Denominator (unit that matches given )
  • Multiply Across and then divide

11
CW/HW RQ SI System Part 2
  • 1. The unit kilograms implies we are measuring?
  • 2. Cm3 implies we are measuring the volume of a
    ____?
  • 3. Measure the volume of your desk
  • Length b. Width c. Height
  • 4. Greater mass? 45.7mL of a liquid or 27.8 mL of
    that same liquid
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