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The International System of Units and The Metric System

The International System of Units and The Metric System. The International System of Units. Also known as SI units It is the modern day metric system It is a form of measurement used all around the world. When was SI created?.

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The International System of Units and The Metric System

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  1. The International System of Units and The Metric System

  2. The International System of Units • Also known as SI units • It is the modern day metric system • It is a form of measurement used all around the world

  3. When was SI created? • The system of measurement was created in 1960 after the General Conference on Weights and Measures asked the International Committee for Weights and Measures to conduct a study on international measurements. • In 1954, they created six base units: • Meter, kilogram, second, ampere, Kelvin, and candela

  4. When was SI created? (cont.) • In 1960, they created the name International System of Units, abbreviated SI, from the French name: Le Systeme international d’unites. • They added ONE more SI unit (mole) in 1971

  5. SI units, Symbols and Quantity

  6. The Metric System • A system of measurement based on the number “10” • Records show it was used in the mid 1500’s • Used ALL over the world as the main system of measurement, EXCEPT in these countries: • Liberia • Burma • The United States

  7. Prefixes

  8. Length • Definition- the distance from one point to another • Basic SI Unit- meter (m) • Tools to measure length- • metric ruler (centimeters) • Meter stick (100 centimeters)

  9. Mass • Definition- the measure of the amount of matter in an object. • Basic SI Unit- kilogram (k) • Tools to measure mass: • Scale • Triple Balance Beam

  10. Difference between Mass and Weight • Mass- the amount of matter in an object • Weight- a measure of the force of gravity acting on an object. It is measured using a scale. • You mass is the same, no matter where you go. Your weight changes due to gravity. • Ex: You weigh 100 lbs on Earth. If you went to the moon, you would weigh 16.6 lbs.

  11. Volume • Definition- the amount of space an object takes up. • Basic SI Unit- Liter (L) • Tools to Measure Volume: • Volume of a Liquid- graduated cylinder (L) • Volume of Rectangular Solids- • Length x Width x Height (cm3) • Volume of Irregular Solids- Water displacement

  12. Density • Definition- a measure of how much mass is contained in a given volume. • Units- • g/cm3 or g/mL • Calculate- • Density= Mass/ Volume

  13. Time • Definition- • Basic SI Units- second (s) • Tools for measure time- • Clocks • Watches

  14. Temperature • Definition- How warm or cold something is • Basic Units of SI- Kelvin (K) • Scientists use Celsius (C) • Tools to Measure Temperature- • Thermometer

  15. Conversion between Units • How do you convert Meters to Centimeters? • Write down the number you want to convert and its proper unit. Ex: 100 meters = ? cm • If the number is a whole number, add the decimal point at the end of the number. Ex: 100. meters • Using the conversion chart, move the decimal point towards the proper unit.

  16. Conversion Chart

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