Glass of water.
Salt.
Small objects (e.g., paper clips, small plastic toys)..Add Salt: Dissolve a large amount of salt in the water.
Test Objects: Place small objects in the saltwater and observe if they float or sink.
Compare with Fresh Water: Test the same objects in fresh water and compare the results.
Record Observations: Have students describe how the saltwater affects the objects.
Discussion: Discuss how increasing water density affects buoyancy.