International System (SI) of Measurement

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Presentation transcript:

International System (SI) of Measurement

International System of Measurement The International System of Measurement is a revised version of the Metric System. The measuring system consists of seven base units.

International System of Measurement From these base units, all other SI units of measurement are derived. Derived units consist of one or more base units used in combination and are used for measurements such as volume and density.

International System of Measurement Quantity: Length Definition: Distance between two points SI Unit: Meter (m) Lab Unit: Centimeter, Kilometer, Millimeter…. Base/Derived: Base Unit Lab Equipment: Meter Stick/Ruler

International System of Measurement Quantity: Mass Definition: Amount of Matter SI Unit: Kilogram (Kg) Lab Unit: Gram (g) Base/Derived: Base Unit Lab Equipment: Balance

International System of Measurement Quantity: Time Definition: Interval between two occurrences SI Unit: Second (s) Lab Unit: Second (s) Base/Derived: Base Unit Lab Equipment: Stopwatch

International System of Measurement Quantity: Temperature Definition: Average Kinetic Energy of the Particles SI Unit: Kelvin (K) Lab Unit: Degree Celsius (oC) Base/Derived: Base Unit Lab Equipment: Thermometer

International System of Measurement Quantity: Amount of Substance Definition: Number of particles in a sample SI Unit: mole (mol) Lab Unit: mole (mol) Base/Derived: Base Unit Lab Equipment: Periodic Table

International System of Measurement Quantity: Volume Definition: Amount of space SI Unit: Cubic meter (m3) Lab Unit: Liter (L) or milliliter (mL) Base/Derived: Derived Unit Lab Equipment: Graduated Cylinder or Ruler

International System of Measurement Quantity: Density Definition: Amount of matter in a given space SI Unit: g/cm3 Lab Unit: g/ml Base/Derived: Derived Unit Lab Equipment: Balance & Graduated Cylinder

Measuring Volume Meniscus – the curve that forms at the surface of a liquid measure the center of the curve for accuracy Volume of a symmetrical solid-measure dimensions with a meter stick; use correct mathematical formula Volume of an irregular solid  water displacement measure an amount of water in a graduated cylinder; place object to be measured in cylinder; read the new level of water; subtract the starting level from the final level. 1 cm3 = 1 ml