This collection of teaching tools, authored by the Space Telescope Science Institute (U.S.) includes lithographs, fast facts, graphic organizers, question and answer sessions, and online explorations on an array of...

This site, from the University of Toronto, provides an overview of chaos theory and concisely explains the characteristics of chaotic systems. The bifurcation of a rabbit population, with the transition to chaos, is...

The activity provided on this web page offers students a chance to understand how mirrors can be used to create the appearance of defying gravity. With an easy setup, these activities can make students appear to perform...

This activity from the provides a demonstration of the relationship between an object’s center of gravity and its angular momentum. One attempts to balance a stick with a piece of clay stuck to it in various locations. ...

This activity from the Exploratorium provides a technique for determining the center of gravity of a long, thin object using only one’s hands. A yard stick, with a piece of clay to displace its center of mass, is placed...