THE BOOK: An Engineer's Guide to the Digital Transition
This online guide was written to help engineers make the transition from analog to digital designs and implementations, with a specific focus on audio and video systems. The material is quite extensive and includes a wealth of application notes and "information on video formats, standards and interconnection considerations." Everything from high-level system design to proper routing techniques for different kinds of cables and signals is covered. The success of this guide prompted the creation o
Ocean World: Coral Reefs
Texas A&M University presents Ocean World, a Web-based educational resource for oceanography. The feature on coral reefs has the most direct life sciences application, with easy-to-navigate sections about the coral animal, coral reefs as the rainforests of the sea, symbiosis, ecosystem services, and coral reef threats and conservation. The Web site also includes a handy hypertext glossary, an interactive quiz, and annotated links to interesting Web sites, including sites that provide real-time r
The Pherobase was developed by Dr. Ashraf El-Sayed, a research scientist at HortResearch in New Zealand, with the primary objective of providing "coverage of the literature published on chemical communication in insects." The Pherobase is intended for use by both scientific and non-scientific communities and currently contains "over 10000 entries, around 3000 molecules, and over 32000 static html pages that make it the world's largest database of behavior modifying chemicals." The site contains
Unidata K-12 Weather Sites
Unidata is a community, consisting mostly of educators and researchers, which provides "data, tools, and community leadership for enhanced Earth-system education and research." In this section of the website, Unidata members suggest some of their favorite K-12 websites that educators can use to teach about weather. Along with each website link is a short description of the resource. Some websites are described as offering multimedia instructional resources and weather data, while others offer in
Floods: The Awesome Power
A newly released publication from the National Oceanic and Atmospheric Administration, the National Weather Service, and the Red Cross is entitled "Floods: The Awesome Power." The citizen-focused sixteen-page preparedness guide explains "flood-related hazards and suggests life-saving actions you can take." Readers will learn what flash floods are, what to do if youre caught in your vehicle during a flash flood, what river floods are, how tropical cyclones create floods, where to get current we
The Music Acoustics Web site is maintained by the University of New South Wales School of Physics. General topics covered include what a decibel is, what interference beats are, what a sound spectrum is, what acoustic impedance is, and others. Specific instrument questions are also answered, such as waves in strings, flute and clarinet acoustics, Helmholz resonance, and pipes and harmonics. This very interesting site, with its many illustrations and animations, along with its easily-read text, a
History of Energy
This latest Topic in Depth delves in the Webï¿½s offerings on the history of energy. The first site is maintained by the US Department of Energy, which is called Milestones in the History of Energy and Its Uses (1). From fire to the discovery of nuclear energy, the site gives short descriptions on significant events in the history of energy for each century, events by particular fuel type, events by energy uses, how energy uses have changed, energy consumption changes, and more. The next site
Jantar Mantar: The Astronomical Observatories of Jai Singh II
This website, created by the Cornell University Professor of Art, Barry Perlus, presents the five astronomical observatories in west central India. After reading a short introduction to the observatories, users can explore interactive panoramas of the observatories, built in the 18th century, using QuickTime. The website also offers still images and animations of the Samrat Yantra. Visitors can learn about the latest design plans and additions to the website. The website features downloads of ar
The Meteoritical Society
"The Meteoritical Society is a non-profit scholarly organization founded in 1933 to promote the study of extraterrestrial materials and their history." The website provides the latest Society news and downloads to its annual newsletter and bulletins. Scientists can find out about upcoming meetings and workshops, Society publications, and membership opportunities. Students and educators can locate materials describing meteorites, tektites, dust, and lunar samples as well as links to outside educa
The Mission-A Great Scientific Adventure
At this interactive website, enhanced by Macromedia Flash Player, students can perform 19 creative scientific missions, including three super-missions. The missions include interesting clues, fun games, and stimulating quizzes. Users obtain chemical elements as an award for each mission they successfully complete with the ultimate goal of filling the Periodic Table. Through the activities developed by the National Film Board of Canada (NFB), students can learn about lightening, cloud types, elec
Hawaii Coral Reef Assessment and Monitoring Program: Bibliographic Database
This coral reef-related Bibliographic Database was developed by the Hawaii Coral Reef Assessment and Monitoring Program (CRAMP). CRAMP conducts research "designed to identify the controlling factors, both natural and anthropogenic, contributing to the stability, decline, or recovery of Hawaiian reefs. The CRAMP "Bibliographic Database contains listings for published and unpublished documents concerned with the coral reefs and inshore marine resources of Hawaii." More than 2,500 references are cu
Ozone in the atmosphere : ozone depletion
What processes cause a depletion of the ozone layer? This informational page, part of an interactive laboratory series for grades 8-12, explores natural and human-made destruction of the ozone layer. Here students read about the instability of ozone atoms and the naturally changing quantities of ozone in the air. Volcanoes, the oceans, and other natural processes provide chemicals that break down ozone. Chemical equations of the breakdowns are provided. A discussion of the use of chlorofluorocar
Comparing and Ordering Rational Numbers
Compare and order a rational number using an area model.
National Gardening Association
This is the homepage of the National Gardening Association, a nonprofit organization established to help gardeners, and to help people through gardening. The Web site contains loads of garden-related information, including over 2,000 articles, 30,000 FAQs, seed swap programs, a zone finder, pest control library, and much more. The site does advertise some retail items, but all information in this extensive online resource is available free of charge.
Whats It Like Where You Live? Desert
This site provides excellent background information on deserts. Large print and superb pictures make this site very appealing to younger students. Topics include: What is a Desert Like?, Types of Deserts, What causes Deserts?, Deserts of the World, Desert Plants, Desert Animals, and links to other desert sites.
This appealing site by Kapili.com has lots of information and neat photos, this is a great site to learn about how to study and classify life forms, ranging from cells and microbes to plants and animals. Visitors can be guided through the site tour, browse, or search for specific topics. The site is interesting and informative.
Seeing our world through a different light
The Cool Cosmos team has made its main occupation to communicate and explain the world of infrared astronomy to students and the public at large. We have created websites that explain Infrared Astronomy, its timeline, as well as the many benefits and uses of Infrared in the different aspects of our lives. We have created award-winning web activities where students perform a version of the experiment in which the famous astronomer Sir Frederick William Herschel discovered infrared light. We have
USGS News and Information on El Nino
This web page assembles the publications of the USGS related to El Nino. Much of the material viewed in mid-2001 is about the extreme 1997-1998 El Nino season. Topics include floods, landslides, coastal hazards, and climate. Users can also look under news releases and find related links. An article is also devoted to explaining El Nino.
Celestial navigation is the process of finding your position on Earth based on astronomical guideposts. In this lesson, explore the principles of navigation; build tools to observe celestial bodies, and learn how science, mathematics, technology, and history are intertwined.
Design Step 5: Construct a Prototype
Students learn about the manufacturing phase of the engineering design process. They start by building prototypes, which is a special type of model used to test new design ideas. Students gain experience using a variety of simple building materials, such as foam core board, balsa wood, cardstock and hot glue. They present their prototypes to the class for user testing and create prototype iterations based on feedback. (Note: Conduct this activity in the context of a design project that students