By examining the properties of plumberÕs tape (also known as Teflon Tape) in a fun and engaging secret message context, students will draw conclusions about the structure of Teflon (PTFE Ð polytetrafluoroethylene).
In this demo, two polyethylene strips are charged on one end by rubbing with wool. One charged strip is then mounted on an evaporating dish and the other charged strip is used to make the dish spin.... read more
Categories: Lab/Student Activity
Predator–prey relationships are one of the most important biotic relationships in the sustainability of an ecosystem. Predators are the natural controls in an ecosystem, limiting the size of a prey... read more