Understanding Density: Will It Sink or Float?

DESCRIPTION

In this engaging lesson based on "Science Starters" by T. Trimpe, students will explore the concept of density through a practical application. Using a box with a mass of 386 g and dimensions of 23.5 cm x 6.4 cm x 7.8 cm, students will calculate its volume and density to determine whether it will sink or float in water. The calculations show that the density is 0.33 g/cm³, indicating that the box will float. This hands-on activity is excellent for understanding the principles of buoyancy and density in a fun way.

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Feb 12, 2026

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Understanding Density: Will It Sink or Float?

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Sink or Float? Density #2 R. Bryant 2008 WSMS – Based on “Science Starters” by T. Trimpe at http://sciencespot.net
Find the density of the box below. Mass386 g 23.5 cm 6.4 cm 7.8 cm
The solution … Volume = length x width x height V = 23.5 cm x 7.8 cm x 6.4 cm V = 1173.12 cm3 M = 386 g Density = Mass ÷ Volume D = 386 g ÷ 1173.12 cm3 D = 0.33 g/cm3 **The box would float!