Scientific measurement


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This presentation provides a quick breakdown on how SI works.

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Scientific measurement

  1. 1. Scientific Measurement
  2. 2. The International System of Units The international system of units also known as SI Developed in the late 1700’s This is the system of measurement used by scientists around the world.
  3. 3. The International System of Units The system was created to let scientists communicate even if they didn’t speak the same language. There are many different units of measurement used throughout the world.
  4. 4. Notes: SI system SIlets scientists all over the world use the same measurements even if they speak different languages.
  5. 5. SI Many of these units were based on parts of the body such as the foot. Other units such as inches were based on grains of barley. These different units caused problems when scientists from different countries tried to work together. Other problems occurred with units based on things that could change size like a foot.
  6. 6. About SI SI is a base 10 system This means that each unit of measurement is based on multiples of 10. This makes conversion between units easy It also eliminates fractions like in American standard, and uses decimals instead.
  7. 7. Notes: SI Units of Measurement The SI unit of length is meters The SI unit of mass is kilograms The SI unit of volume is liters The SI unit of temperature is Kelvin or Celsius
  8. 8. SI Units of Measurement SI units for length  Meter (m)  Kilometer (km) 1km = 1,000m  Decimeter (dm) 1dm = 0.1m  Centimeter (cm) 1cm = 0.01m  Millimeter (mm) 1mm = 0.001m 1
  9. 9. SI Units of Measurement SI unit of volume  Cubic meter (m³)  cubic centimeter (cm³)  Liter (L)  Milliliter (mL)
  10. 10. SI units of measurement SI unit of temperature  Kelvin(K) 0°C = 273K  Celsius (°C ) 100 °C =373K
  11. 11. SI unit of Mass Kilogram (kg)- equal to 1,000 grams. Gram (g)- basic unit of mass Milligram(mg)- one thousandth of a gram,
  12. 12. Temperature Temperature, measures the average heat, or energy of motion, in the molecules of an object. The SI units of measure for temperature is Celsius (C) and Kelvin (K) The standard unit is Fahrenheit
  13. 13. Temperature Thefreezing and boiling points of water are the benchmarks for Celsius and Fahrenheit . Freezing for C is 0° and boiling temperature is 100°. This is why the Celsius scale is also known as the Centigrade scale.
  14. 14. Temperature Kelvin uses a different benchmark. Thelowest temperature on the Kelvin scale is absolute zero. This is the point at which all motion in molecules stop.
  15. 15. Common uses of SI Area: is the size of the surface of an object. You find it by multiplying length x width l xw Mass, is the amount of matter in an object. You find it by using scales. Volume, is the amount of space an object takes up, it is 3 dimensional. You find it by multiplying length x width x height, (l x w x h)
  16. 16. Density Density, is the amount of matter in an object in a given volume. Density = mass divided by volume or D= m v