Don't be dense—use a robust resource. The second installment of a five-part Floaters and Sinkers unit has learners determine the densities of several objects. As part of the activity, they learn the displacement method for finding volume. They'll then plot a mass versus volume graph and predict which objects will float in water.

Concepts

density, displacement, volume, sinking and floating, technology resources

Show More Show Less

Additional Tags

density, displacement, x-y scatter graph

Show More Show Less

Instructional Ideas

• Have pupils create a graphic organizer summarizing density concepts

Classroom Considerations

• A variety of materials is necessary for the activity; see resource for complete list
• Scholars must be familiar with volume formulas for solids (prisms, cylinders, spheres)

Pros

• Provides a recording sheet for the activity
• Lists some troubleshooting tips

Cons

• None

Common Core

6.SP.B.4 7.EE.B.3 7.G.B.6 8.SP.A.1 HSG-GMD.A.3 HSG-MG.A.3