Students explore questions which cannot be handled with simple pendulums, and examine both the usefulness and the limitations of approximations in science. A Java applet created from a Stella model is included.

In this biology worksheet, students complete a crossword puzzle with 35 questions about reptiles. They identify the different types of reptiles.

Students examine the influence of the end wall. They find a basin size and wind speed such that a given wall height is overtopped. Then, increase the wall elevation until overtopping stops. Students explain the difference in results.

In this chemistry worksheet, students complete an online calculation focused upon the Law of Gases. The sheet requires the right kind of internet browser.

A good site that begins with the background and branches into the structure, function and applications of technology. This version of the page requires Java, and should open some applets that allow you to see the structures in 3-D.

Molecular Expressions at Florida State University offers a java applet to show the a working AC generator.