Describe what density means, in words.

Density is a measure of how much mass a substance has, per unit of its volume.

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What is the formula that links density, mass, and volume?

Density (๐œŒ) = mass (m) รท volume (v) 


๐œŒ = m รท v

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What are the units of density?

kg/m3 or g/cm3

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How might you experimentally calculate the density of a regularly shaped object (e.g. a cube)?

density = volumemassโ€‹


  1. Measure the object's mass using a balance.
  2. Use geometry to calculate the object's volume.
  3. Use the mass and volume to calculate the density.

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How do you convert from g/cm3 to kg/m3?

Multiply the g/cm3 value by 1000.


e.g. 0.525 g/cm3 = 525 kg/m3


(if this seems wrong, make sure you're reading the units correctly - from grams to kilograms, and from cm3 to m3)

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How might you experimentally calculate the density of an irregularly shaped object (e.g. a rock you found)?


  1. Measure the object's mass using a balance.
  2. Use a Eureka can to measure the object's volume.
  3. Use the mass and volume to calculate the density.

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