Density - Discrepant Events (Jane Pafundi)

Jane Pafundi

Principles Illustrated

Density is mass per unit volume.

Density of an object determines if it floats or sinks.

Objects more dense than the fluid they are submerged in sink.

Objects less dense than the fluid they are submerged in float.

Physical Science - 8th grade

Density and Buoyancy

All objects experience a buoyant force when immersed in a fluid. As a basis for understanding this concept:
1. Students know density is mass per unit volume.
2. Students know how to calculate the density of substances (regular and irregular solids and liquids) from measurements of mass and volume.
3. Students know the buoyant force on an object in a fluid is an upward force equal to the weight of the fluid the object has displaced.
4. Students know how to predict whether an object will float or sink.