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Understanding Density: Mass per Volume Unit Comparison

Learn about density, a derived unit showing mass per unit of volume. Compare material density and discover unique densities for various substances. Experiment with sink or float scenarios and solve density-related problems.

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Understanding Density: Mass per Volume Unit Comparison

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  1. Density

  2. What is It? • Derived unit which shows the mass per unit of volume • Density = Mass/ Volume • More dense materials are “heavier” than less dense materials • Compares mass without variable of size

  3. Units of Density • For liquid or gas - g/ml • For solid – g/cm3

  4. Every Material Has A Unique Density • Lead 11.35 g/cm3 • Granite 2.70 g/cm3 • Water 1.00 g/ml • Ice .91 g/cm3 • Cork .24 g/cm3

  5. Sink or Float • Substances less dense than water float • More dense than water they sink

  6. Example 1 • What is the density of alum with a volume of 4.00 cm3 and a mass of 10.8 g?

  7. Example 2 • A piece of quartz has a volume of 30 cm3. The density is 2.65 g/ cm3, what is the mass?

  8. Example 3 • Bone has a density of 1.85 g/ cm3, what is the volume of a 55g bone?

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