Have students record their predictions of the relative viscosities and of the shapes created before carrying out the tests. Measure the viscosity by timing a ball bearing as it drops through 20 cm of the fluid in the tubing. Compare results with original experiment and note similarities and differences. An Introductory Course, June 1996 edition, starting on page 1-11. Record results in a data table in lab book, and collect class results on chalkboard.
Students bring in viscous transparent fluids from home to test.
Discuss similar patterns occurring in nature.