Mass, Weight and Density

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Mass, Weight and Density

• Chapter 1

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Matter

• What the world is made of
• All objects consist of matter
• Properties of matter ways to describe objects
• Mass
• Weight
• Volume
• Density

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Density

• Objects density gt 1 g/mL the object will sink in
  water
• Objects density lt1 g/mL the object will Float in
  water

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Mass

• Most important property of matter
• Amount of matter in an object
• Mass never changes
• Also measured by inertia
• (inertia is an objects resistance to change its
  motion all objects that have mass have inertia)
• Units are kg, g, mg

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Weight

• Response of mass to the pull of gravity
• If an object has mass it has weight
• Weight changes depending on gravity
• Units Newton (N)
• Weight mass x 9.8 m/s2

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Density

• Mass per unit volume of an object
• Compare different masses with the same volume
• Units grams/milliliter g/mL or grams/cubic
  centimeter g/cm3
• density of water is 1 g/mL

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Density

• Density mass or M
• --------------
  ----------
• volume V