Subject(s): Science, Mathematics
Grade Level(s): 10, 11, 12
Computer for Presenter, LCD Projector
Keywords: Avogadro's number, Mole, Chemistry
This lesson was designed with two primary goals in mind. First, this lesson seeks to provide students with an appreciation for the magnitude of the mole. It is difficult for students to fathom a number as large as 6 x 1023, so this lesson uses macroscopic objects such as Ping-pong balls, combined with a series of exercises in estimation, to help them wrap their heads around such an enormous quantity. The second goal of this lesson is to help build students’ estimation skills and number sense. Too often, students rely on the answers their calculators spit out without taking the time to check and see if these answers make sense. The estimation activities in this lesson help students let go of the need to obtain a precise numerical answer and instead encourage them to think about the relative magnitudes of different numbers.
Source and Access Information
Name of Author/Source: Elizabeth Murray
District/Organization of Contributor(s): Massachusettes Institute of Technology
Access Privileges: Public
* Please note that examples of resources are not intended as complete curriculum.