Density Lab: Determining the Density of the Glass in a Snapple Bottle by Non-Destructive Methods

Density is an important concept in Physics especially at the High School Level. Most students cannot explain how a steel ship of thousands of tons can float in water. The basic concept is that an object can float if its density is less than the density of the liquid it is in. Conversley, an object sinks if its density is greater than the density of the liquid it is in. As density is an average property, this lab is designed to help students develop a thorough understanding of density through a hands-on experience. They must determine the density of the glass in a Snapple bottle by non-destructive means. This involves measuring various masses and volumes, solving sophisticated equations, and developing detailed lab procedures. The Lab uses a minimum of equipment: A Snapple bottle, three glass cylinders, 100 ml and 10 ml graduated cylinders, scales (1 g accuracy), beam balances (0 .1 g accuracy), water, salt water, and alcohol. By the end of the lab, students have a thorough understanding of the concept of density and its uses.