It is colorless and scentless, but it makes a large impact on the environment. Learners explore carbon dioxide emissions and what they mean for the environment using an interactive graph. They review changes over time and how they impact...

In this second of three lessons on power plants, future engineers find out how we generate electricity and how coal-powered plants operate. They work in small groups to make electromagnet generators to light LED bulbs. A set of...

Describes the evolution of Thomas Newcomen's steam engine development. Provides several photographs and sketches of Newcomen's machines.

This complete chronology of steam power is designed in time line fashion. Next to each year is a detailed description of the invention. Another useful aspect of this site is the "Link to the decades," found at the top of the page. Each...