PASCO Specialty & Mfg. DISCOVER DENSITY SET SE-9719 Manual De Usuario

012–07192A

Discover Density Set

The PASCO SE-9719 Discover Density Set provides materials and activities to

guide students through some basic graphical analysis techniques.

In each case, an example is worked out, with explanations, and then the

student is asked to perform a similar analysis based on the materials in the set.

In the first analysis, students discover the concept as a mathematical constant

relating measurements of a particular substance.

Then they are asked to discover experimentally an equation that predicts the

mass of spheres of unknown, but constant, composition, based on their

diameter.

Finally, they are lead to develop an equation in three variables that predicts the

mass of cylinders of unknown, but constant, composition, based on

measurements of their diameter and length.

The only mathematical formula students are expected to know is that for slope.

If they recall special volume formulas for spheres and cylinders, they are asked

not to use this information in the development of their equations.  After

graphical analysis yields the desired equations, students can use volume

formulas and tabulated density data to verify the correctness of the equations

they have discovered experimentally.

Because the items in the set are machined to close tolerances, and dimensions

and masses are given in the teacher’s guide, the set may be used for other

purposes, such as a traditional density set, or as items to test students’ ability to

make accurate measurements, etc.