Mass,+Volume,+and+Density

Standard 2 Define mass, volume, and density.

• Identifying the atom as the basic building block of matter • Relating temperature changes to particle motion Example: movement of colored dye in hot and cold water • Relating density to the sinking or floating of an object in a liquid

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1.  Mass is the amount of matter in an object. ======

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a.  There is a difference between mass and weight. Mass measures the quantity of matter (it is the same all over the universe) ======

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b.  Weight is about the same as mass but it depends on the objects location in the universe. ======

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2.  Density is the amount of mass ======

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a.  Density is a physical property of matter example: a rock is more dense than a crumpled piece of paper of the same size. A Styrofoam cup is less dense than a ceramic cup. ======

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b.  A piece of wood that floats on water it is less dense than water vs. a rock sinks in water, it is more dense than water. ======

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3.  Volume is the amount of space an object takes up. ======

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a.  Example – a crumpled piece of paper and a rock the same size has the same volume, but the density will be different. ======

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1.  Amount of matter in an object – MASS ======

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2.  Amount of space the object takes up – VOLUME ======

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3.  Amount of mass per unit volume of the object – DENSITY ======

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4.  Amount of force of gravity on the object – WEIGHT ======

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·  To determine the density of an object you would compare the mass and the volume. D=m/v ======