Fluid Viscosity
Lindy Elkins-Tanton, Massachusetts Institute of Technology
Laboratory activity to introduce students to measuring fluid viscosity. Key words: Viscosity, fluid, Stokes, rheology, graduated cylinder.

Reaching for a Star... (and finding its diameter!)
Jan Davagian
The use of metric units and measuring skills are reviewed. Extreme distances are measured using a pinhole camera to set up ratios of similar triangles.