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

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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.

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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.

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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)

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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

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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