Why do objects like wood float in water? Does it depend on size? Create a custom object to explore the effects of mass and volume on density. Can you discover the relationship? Use the scale to measure the mass of an object, then hold the object under water to measure its volume. Can you identify all the mystery objects?

Sample Learning Goals

  1. Derive the formula to calculate density from their understanding of mass and volume
  2. Use the formula to determine density, mass and volume
  3. Describe some applications of density in real life, such as ships travelling on the sea and hot air balloons.Describe how the concept of density relates to an object's mass and volume.
  4. Explain how objects of similar mass can have differing volume, and how objects of similar volume can have differing mass.
  5. Explain why changing an object's mass or volume does not affect its density (ie, understand density as an intensive property).
  6. Measure the volume of an object by observing the amount of fluid it displaces.
  7. Identify an unknown material by calculating its density and comparing to a table of known densities.

For Teachers

Get students to complete a density investigative project by conducting a virtual experiment to determine whether a gold wreath is made of pure gold. They are tasked to complete a multimedia presentation based on what they have experimented and submit online.

Software Requirements


Microsoft Windows
Macromedia Flash 9 or later
OS 10.5 or later
Macromedia Flash 9 or later
Macromedia Flash 9 or later



Design TeamThird-party LibrariesThanks To

Other Resources

  1. Buoyancy by ukukuku

end faq

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Parent Category: 02 Newtonian Mechanics
Category: 03 Mass Weight Density
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