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Published byJanice Lane Modified over 9 years ago
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Density Density = mass / volume (D = m/v) Mass = amount of stuff (matter) -- NOT weight, which is mass times gravity You weigh less on the moon, but your mass is the same.
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Density Volume = amount of space a thing occupies. L x W x H (cm3) or graduated cylinder (ml). ** Density measures how much stuff (mass) fits in a certain amount of space (volume).
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Examples Suitcase analogy Styrofoam cup Styrofoam bag vs. paper clip = more mass doesn’t mean more dense.
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Density The more closely packed stuff is, the denser it is.
Water has a density of 1 g/cm3 Is a broken piece of rock the same density as the original rock? YES.
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Density Temperature = how fast atoms are moving. Heat excites atoms and they bump into each other... temperature increases. Excited atoms move apart, so density decreases (less dense).
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Temp. vs. Density
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Density Pressure: Pressure causes volume to decrease. Atoms get pushed together and packed tightly. As a result, density increases
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Pressure vs. Density
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Density When Earth was formed: - dense material sank (mantle/core. - lighter material floated (crust) Density differences = convection. - weather - ocean currents
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