How can city buses be made to run more quietly and produce less pollution? This article, part of a series about the future of energy, discusses the use of hydrogen-powered buses in Chicago and Vancouver. Students read about plans to place hydrogen-powered buses in six of the world's smoggiest cities and the potential for reduced air pollution. Copyright 2005 Eisenhower National Clearinghouse
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.
Positive Linear Function Machine
This activity allows the user to explore simple linear functions; the function is determined by looking for patterns in the outputs.
Ice Cube of Exotic Microbes
This article describes a permafrost subglacial lake discovered beneath Antarctica. The lake offers scientists a chance to test their sterile drilling techniques before exploring elsewhere in search of exotic microbes. Techniques that avoid contaminating a drill site with microbes, suggests the author, would prove useful for future drilling into Mars polar caps in search of life.
What is sugar?
This reading, part of a site about the science of cooking, provides general scientific information about sucrose (white table sugar) together with explanations of the science behind some candy-making procedures. The general information includes the chemical formula of sucrose and a ball-and-stick model that illustrates that sucrose is made of fructose and glucose. Regarding candy, the reading describes how heating a sugar solution produces a supersaturated solution. A discussion about common tec
Energy and work
What is the difference between energy and work? This reading, part of a series about the future of energy, introduces students to the connection between energy and work. The page defines work and gives several examples of the relationship between work and energy. Copyright 2005 Eisenhower National Clearinghouse
This web page offers basic illustrated information about Pythagoras and the famous equation he and his followers are credited with developing. The page contains a link to an applet that demonstrates the meaning of the equation. From the applet, links to three problems show the equation's application in baseball, scaling a wall, and in construction. This web page requires the student know what a right triangle is and how area is measured. Copyright 2005 Eisenhower National Clearinghouse
Observe solar eclipses
This Earth science animation helps students compare three types of solar eclipses: total, partial, and annular. The introduction explains how the type of eclipse is determined by variations in distance and alignment between the Earth, sun, and moon. The animation follows the events of all three eclipses concurrently. Movie controls allow students to repeat, pause, or step through the animation, which can give students more time to compare the eclipse sequences. Copyright 2005 Eisenhower National
Science 101 : How Do Microscopes Work?
Microscopes allow scientists to examine everyday objects in extraordinary ways. They provide high-resolution images that show objects in fine detail. This articles includes details on how microscopes work and how they enhance the scientific process.
Observe a visual model of Earth's spheres
This Earth science resource enables students to view Earth's four spheres--the geosphere, hydrosphere, biosphere, and atmosphere. The visualization is introduced by a paragraph that defines the four spheres. Below the paragraph, there is an image of a globe that a viewer can animate by clicking on it. The globe separates into four globes, each of which shows one sphere and is labeled with the appropriate sphere name. The animation contains a legend to explain the color coding used. Controls allo
This hypertext book by Andy Carvin includes chapters on the role of the Web in education, a crash course in HTML, history and explanations of the Internet, educational reform and information technology, successful case studies, and K-12 resources on the net.
How are Earth's spheres interacting?
This Earth science investigation leads students through a brief introduction of the spheres of the Earth and an exploration of the interactions among the spheres. The seven-step investigation incorporates a mixture of informational text, questions, and images. After reading about and interacting with an image of the four main spheres (the atmosphere, hydrosphere, geosphere, and biosphere), students are introduced to the concept of sphere interactions as part of the larger Earth system. Text, que
Ebola infection reported
This article describes cases and outbreaks of Ebola virus. The focus is on how little is known about Ebola and Marberg viruses, especially about how certain people survive those infections. Copyright 2005 Eisenhower National Clearinghouse
Ecological Footprint: Overshoot
In this two-minute sound segment, the director of the Sustainability Program for the public policy group Redefining Progress discusses the concept of your ecological footprint. This is the amount of nature it takes to support your lifestyle. He says that if we use more than can be replaced by nature we are in a condition called overshoot. He suggests that this can continue for a while but eventually someone will have to pay with a lower standard of living. This site is from an archive of a daily
Seed Dispersal 101
This two-minute radio program introduces listeners to the variety of agents that disperse seeds. The program's guest, a plant biologist, cites examples of nonliving and living dispersal agents that include the wind, water, and such animals as birds and bats. He also explains that a plant's fruits or seeds often offer clues about how they are dispersed. The program, which is available here in audio and text, is the first in a series about seed dispersal. Copyright 2005 Eisenhower National Clearin
Etymologies of Algebra, Geometry, Trigonometry
What are the origins and roots of the words geometry, algebra, and trigonometry?
Art of the Tetrahedron
Any four points in space that are not all on the same plane mark the corners of four triangles. The triangles in turn are the faces of a tetrahedron. It's the simplest of all polyhedra--solids bounded by polygons... To sculptor Arthur Silverman of New Orleans, however, tetrahedra are very special. He has been investigating variations of tetrahedral forms for more than 20 years in sculptures displayed in public spaces in New Orleans and other cities from Florida to California.
Examine evidence of Earth turning about an axis
Using an animation of the classic pendulum experiment, this resource supplies middle and high school students with evidence of the Earth's rotation on its axis. The introduction explains that although pendulums are known to swing in a fixed path, on Earth their path appears to shift over time. As the animation reveals, it is not the pendulum's swing that changes--it is the Earth beneath the pendulum that moves. The animation contains three screens: two with different views of a pendulum swinging
Simple Coordinates Game
This activity allows the user to plot points on the coordinate plane and to read the coordinates of a point plotted by the computer.
Winning secrets to teaching excellence
Using quirky metaphors, inspiring student questions and working day and night — these are some of the winning strategies that have led three Simon Fraser University professors to clinch an SFU 2010 Excellence in Teaching award. See also: http://at.sfu.ca/cwcBOy