1.2 Amount of Space Occupied by Matter       Lesson 1.2

What units are used to express the amount of space occupied by matter?
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SI Units
  • Scientists use the International System of Units to measure the properties of matter.
  • The system is abbreviated "SI", after its French name, Systeme International d'Unites.
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  • The SI unit for mass is the kilogram (kg). The gram (g) is the smaller unit.
  • A nickel has mass of about 5 grams, and the mass of a baseball is about 150 grams.
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Volume
  • The amount of space that matter occupies is called its volume.
  • Solids, liquids, and gases all have volume.
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  • The volume of rectangular objects, such as a brick, can be found by multiplying the measurements of length, width, and height.
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  • When you multiply these measurements, you must multiply the units as well as the numbers.
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Common Units of Volume
  • A common unit of volume is the cubic centimeter (cm3).
  • Other units of volume include the liter (L) and the milliliter (mL).
  • A millimeter is exactly 1 cubic centimeter.
  • There are 1,000 millimeters in one liter.