Surface Tension

Why are rain drops spheres?
How can you float a steel needle on water?
AUS-e-TUTE has just added new Surface Tension resources.
AUS-e-TUTE members should log-in to use the new tutorial, game, test.

Not an AUS-e-TUTE Member?
There is a free tutorial available: http://www.ausetute.com.au/surfacetension.html