Science
- 541
- Animated Engines
- Animated pictures help explain the inner workings of a variety of steam, Stirling, and internal combustion engines.
- 542
- Simple Machines
- Gives real-life examples of the six simple machines, plus an easy quiz, and links.
- 543
- Simple Machines
- Explains simple machines such as levers, gears and pulleys with text, pictures and animations.
- 548
- An Introduction to Microscopy
- Includes sections on the history of the microscope, and various creatures you can see with one, including: tree, insects, and microscopic pond life.
- 549
- Dennis Kunkel's Microscopy
- View scanning electron microscope pictures of interesting creatures and household items. Offers a simulation of using an electron microscope.
- 551
- The MicroScape Virtual Laboratory
- View samples from one of these categories: nature, word around your house, and the world of science and technology.
- 552
- The Paper Project - History of the Microscope
- Definitions and types of microscopes, along with connections to telescopes and lenses. Includes names of inventor's contributions and illustrative images.
- 553
- Virtual Electron Microscope
- Choose samples and prepare them for viewing with the electron microscope
- 554
- Divided Highways
- A PBS documentary about the Interstate Highways and their impact on American life.
- 555
- Fast Attacks and Boomers
- Discover how nuclear powered submarines were built, operated and used during the Cold War.
- 557
- TransitPeople's Transportation Lessons
- Tells the history of how people went from one place to another and lists current modes of public transit. Includes online pop quizzes at the end of each section.
- 558
- Transportation and Public Transit
- Includes history, information on trains, some of the problems caused by cars, and different modes of public transit. Includes online quizzes.