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The Color of Water
Provided by WebExhibits.org, the Why is Water Blue? (1) Web site starts off this Topic in Depth. Visitors will learn the factors that affect the colors we see, what color water actually is, and the basic physics and chemistry behind the phenomenon. This site is hard to beat for its clear explanations as well as its interesting photographs and illustrations. The second site, entitled the Common Water Quality Complaints Color Guide (2), gives possible sources of nineteen color variations in water.
Author(s): Brieske, Joel A.

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Cell Membranes Tutorial
New from The Biology Project of the University of Arizona, this online tutorial "introduces the dynamic complexes of proteins, carbohydrates, and lipids that comprise cell membranes," and relates how membranes "are important for regulating ion and molecular traffic flow between cells." Each section of this Web site takes the form of a multiple choice question. Answer the question correctly, and a brief explanation of each answer choice will be displayed. Answer the question incorrectly, and a sh
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The Algodones Dunes, California
The Center for Biological Diversity blends "conservation biology with litigation, policy advocacy, and an innovative strategic vision" in efforts to protect endangered species and wild places, focusing on the western US. This Web site contains a slide show of images from the Algodones Dunes, California's largest dune system. The fourteen slides show images of the area's natural history and environmental threats, such as effects from off-road vehicles. Each slide is accompanied by a brief descrip
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Animal Info
This impressive source for information about endangered mammals is the result of more than a decade of research by Dr. Paul Massicot, who spent 30 years working at the Maryland Department of Natural Resources. Site visitors can locate specific endangered species by browsing the Individual Species Index (either by common or scientific name). The species pages contain references, images, and concise information about population estimates, birth season, density and range, habitat, diet, and more. V
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Fuel Cell Today
Fuel Cells Today is a useful online resource with a very diverse range of materials about fuel cell technology. Possibly the most interesting part of the site is the Reference Centre, where users can find information on different types of fuel cells, their applications, history of their development, possible materials to use in their design, and more. All educational and technical descriptions are intended to promote the global adoption of fuel cells as a clean, efficient energy source. There is
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Teach R Kids Math: Math for Elementary School Kids
Teach R Kids Math is a Web site with a large assortment of interactive lessons that demonstrate basic mathematical concepts. The material ranges from basic counting for preschoolers to more advanced topics for elementary school students. Online worksheets help children practice multiplication and division, rounding, fractions, number sequences, and much more. Some of the activities are timed, which allows the child to see his/her improvement. The site "has been designed by children and adults,"
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Dealing with Waste: The Nuclear Debate
Developed by the Industry Supports Education initiative (ISE), this website allows teenagers to take part in an online debate about how to cope with nuclear waste and whether and how nuclear power should be used in the future. During the debate, the user has a discussion with a virtual devil's advocate (DA). Visitors can either take the role of being in favor of nuclear power or against nuclear power. After the DA makes a statement, the user selects a response that most closely matches his or he
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An Atlas of Cyberspaces
"CyberGeography is the study of the spatial nature of computer communications networks, particularly the Internet, the World-Wide Web and other electronic 'places' that exist behind our computer screens, popularly referred to as cyberspace." The Atlas of Cyberspaces highlights many efforts from around the world to visualize this type of information. Some of the features have links to download software tools, like an experimental browser that portrays Web sites as three dimensional buildings (the
Author(s): Dodge, Martin, 1971-.

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Rewind, Repair, Replay: Three R's to Dependability
One of the most important features in current software applications is the undo command, which allows users to revert to previous states in their documents. A relatively unexplored concept involves system undo, a method of restoring settings in a system that were accidentally changed by the operator. This research paper discusses "a model of undo that matches the needs of human error recovery and retroactive repair." The authors begin by explaining the growing importance of such a mechanism and
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Welcome to the Web
Welcome to the Web is a great place to learn the basics of using the Internet and the World Wide Web. It is tailored to children, but if inexperienced adults can get past the cartoon drawings, anyone can benefit from the site. The first section provides an overview of the Internet and some terminology. Next is a section on guestbooks, followed by an overview of Web browsers. "Searching the Net" and research techniques comprise the last two sections. Each category consists of several interactive
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Thanksgiving Biology
The first Web site (1) is an article from State University of New York College of Environmental Sciences and Forestry. It provides a short, readable introduction to the biology and natural history of wild turkeys in the US. Wild or domesticated, turkey meat is well know for its soporific power. Visitors to the Web site from International Anti-aging Systems (2) can learn all about tryptophan, the amino acid responsible for the post-Thanksgiving dinner nap. Also found in turkey (but much less appe
Author(s): Sohmer, Rachel.

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Learning and Teaching Scotland: Connected
Connected is an online magazine published by Learning and Teaching Scotland, "a national public body which provides guidance and support for teachers, school managers, local authorities, parents and others involved in education in Scotland." The articles featured here focus on ways to use information and communications technology (ICT) in learning, teaching and community development. The current issue is on 'New Teachers and ICT', and includes articles written by new and student teachers, report
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MIT Space Systems Laboratory
Massachusetts Institute of Technology (MIT) created the Space Systems Laboratory (SSL) in 1995 to engage in "cutting edge research projects with the goal of directly contributing to the present and future exploration and development of space." Users can find materials on current and past flight projects such as the Synchronized Position Hold, Engage, Reorient Experimental Satellites (SPHERES) and the Interferometry Program Experiment (IPEX). The website also features SSL's ground programs and re
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Wolfram Graphics Gallery
Wolfram Research, creators of Mathematica software (see also NSDL Report for Math, Engineering, and Technology, July 16, 2004), have posted this gallery of images that demonstrate how "Mathematica has opened the door to a new kind of imagery that melds art and science." The colorful images in the gallery, created by Mathematica users around the world, are grouped by type: 2D Graphics, Polyhedra, Surfaces, and Animations. High resolutions images are available upon request, and in some cases there
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Statistical Education Through Problem Solving
Statistical Education Through Problem Solving (STEPS) was a collaborative project between seven universities throughout the United Kingdom "to develop problem-based teaching and learning materials for statistics." The materials draw on specific problems arising in Biology, Business, Geography and Psychology to help students learn that statistical issues are "important natural parts of the process of reaching conclusions." The software developed as a result of this project, which utilizes the com
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Switcheroo Zoo
As the name implies, the colorfully animated Switcheroo Zoo -- produced by Tubehead, an interactive multimedia studio -- allows you to swap the heads, legs, or tails of various zoo animals to create fantastical new creatures. Not just a place to watch cool morphing animation, this Web site has educational applications as well. Click on Educators' Resources, and scroll to the bottom of the page for a simple lesson plan geared toward younger students. The lesson plan is designed to "expand student
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Bores: Introduction to DSP
Bores Signal Processing is a UK-based company that specializes in digital signal processing (DSP) training. A free service offered on the Bores Web site is this introduction to DSP theory and application. After beginning with a brief overview of DSP, the material delves into the process of converting analog signals to digital signals. Other topics include aliasing, frequency resolution, and quantization error. The material is supported with clear illustrations of sinusoids and techniques of wave
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Red Gold: The Epic Story of Blood
This Web site is the online companion to the PBS television series "Red Gold: The Epic Story of Blood," which aired June 2002. This extensive Web site offers a detailed look into the biology of blood and the "scientific developments that contributed to society's understanding and use of blood." Engaging feature articles make up the bulk of this site, with the addition of video clips from the television series, an education section with lesson plans and a discussion guide, a glossary, relevant li
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National Center of Competence in Research (NCCR) on Climate
The National Center of Competence in Research (NCCR), based in Bern, Switzerland, studies climate change and its impacts on society through "reconstruction of past climate; study of key physical, chemical and ecological processes; and a concerted effort to develop procedures for seasonal forecasting as well as the forecasting of extreme weather events." This extensive website offers summaries of the goals, methods, status, and results for the NCCR's fourteen main projects. While some of the publ
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Science, Engineering, Mathematics, and Technology Network
The Science, Engineering, Mathematics, and Technology Network (SETNET), created by the British Department of Trade and Industry, "seeks to stimulate the interests of young people in science, technology, engineering and mathematics and in pursuing careers related to these subjects." Local networks partner with educational organizations, professional associations, research institutes, industry, government departments, and charities to "deliver high quality STEM activities and experiences to school
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