TOOLS OF SCIENCE

The Metric System

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What’s the Metric

System??

The Metric System is a way of measuring based on the number 10

 This was an easy way for early man to

keep track of things Can you guess why?

That’s easy…. What do the letters SI The French revised it so it is mean??? called THE INTERNATIONAL SYSTEM ( System International)

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The Metric System uses certain tools and units of measure:

Measurement Tool Picture Basic More units Unit Length Meter stick Meter Centimeter (cm) (m) Millimeter (mm) Kilometer (Km)

Measurement Tool Picture Basic More units Unit Volume Graduated Liter Centiliter (cl) Cylinder (L) or Milliliter (ml) (l) Kiloliter (kl)

Cubic centimeter cm3

Volume (definition) = how much space something takes up

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How do I read a graduated cylinder??

Look at the graduated cylinder at eye level

 Find the Meniscus  Measure the liquid at the lowest point of the meniscus

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How does the graduated cylinder find volume of an object???

Think about the definition of Volume. How can we use that definition to find the volume??

When we drop an irregular object into the liquid, the liquid is pushed up or displaced.

The amount that the liquid is displaced is the volume of the object.

This is called Volume by Displacement

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Cubic Centimeter Cm3 This is the unit used for volume of a regular c shaped object (this will be measured with a meter stick)

Measurement Tool Picture Basic More Unit Units

Mass Balance Grams Milligram (g) (mg) Kilogram (kg)

Mass (definition): The amount of matter in

an object

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Measurement Tool Picture Basic Unit Temperature Thermometer Degrees Celcius

o o Freezing: 0 C (32 F English measure)

Boiling: 100o C (212oF English measure)

Converting Temperature

Celsius to Fahrenheit

Fo= 1.8(Co) + 32

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METRIC CONVERSION

Kilo-

1000 units Hecto- 100 units Deka- 10 units Basic Unit deci-

0.1 units centi-

0.01 units milli-

0.001 units

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