Conservation International: Biodiversity Hotspots
From Conservation International, this Biodiversity Hotspots site (first reported on in the October 18, 2002 NSDL Scout Report for Life Sciences) "was re-launched in 2005 with completely updated information as presented in the new book _Hotspots Revisited_." The updated Hotspots website features profiles of more than 30 ecologically important areas of the world. Hotspots are categorized under five world regions including South America, Africa, North and Central America, Europe and Central Asia, a
Super Bowl Technology
One of the biggest technology stories surrounding Super Bowl XXXVII was the security measures used to spot disruptive activity and terrorists. The massive network of cameras that was used to monitor the entire stadium is described in this story (1). It also discusses police operations, face recognition systems, and entrance sensors. The Houston Texans were not in the Super Bowl for 2003, but their stadium is certainly classified as hi-tech. The Reliant Stadium (2) is the first in the NFL to have
African Elephant Specialist Group
The African Elephant Specialist Group (AfESG) operates under the auspices of the Species Survival Commission of the World Conservation Union (IUCN). The AfESG is composed "of technical experts focusing on the conservation and management of African elephants. The broad aim of the AfESG is to promote the long-term conservation of Africa's elephants and, where possible, the recovery of their population to viable levels." The AfESG website contains useful information for conservationists, wildlife m
MIT OpenCourseWare: Fields, Forces, and Flows in Biological Systems
Materials from this intriguingly titled Massachusetts Institute of Technology (MIT) course about biological systems are freely available to students, educators, and others through MIT's OpenCourseWare. The course covers a variety of topics including "conduction, diffusion, convection in electrolytes; fields in heterogeneous media; electrical double layers; Maxwell stress tensor and electrical forces in physiological systems; and fluid and sold continua: equations of motion useful for porous, hyd
The Fields Institute: Lecture Audio and Slides
The Fields Institute for Research in Mathematical Sciences aims to "enhance mathematical activity in Canada by bringing together mathematicians from Canada and abroad, and by promoting contact and collaboration between professional mathematicians and the increasing numbers of users of mathematics." They support research in pure and applied mathematics, statistics and computer science, as well as collaborative projects between mathematicians and those applying mathematics in areas such as enginee
Geological Time Scale
This information about geologic time and the geologic time scale defines the terms relative time (chronostratic) and absolute time (chronometric). Relative time can be thought of as the physical subdivisions of rock found in the Earths stratigraphy and absolute as the measurements taken upon those to determine the actual time that has expired. Absolute time measurements can be used to calibrate the relative time scale, producing an integrated geologic or geochronologic time scale. A feature of t
Function machine (grades 6-8)
Applying a machine metaphor for functions, this virtual manipulative allows the learner to examine the relationship between input (domain) and output (range). The learner inputs numbers from one to four and the virtual machine generates output information in a table. The learner is challenged to find the output for values five through seven and enter them in the table. Errors are noted automatically. Using a new function button, different types of functions are randomly offered for investigation
Seed Dispersal: Lemurs
Trees in Madagascar's forests have evolved traits that promote the dispersal of their seeds by lemurs. This two-minute radio program focuses on the interaction between forest plants and lemurs--the main seed dispersers in the forests. A guest scientist explains why lemurs ingest seeds that are large relative to their body size. He also notes that the fruits of Madagascar's trees have evolved to be strong smelling but drably colored in accordance with lemurs' keen sense of smell and poor vision.
Sounds of the Sun: Inside
A solar physicist explains the significance of the solar sounds that play in the background of this two-minute radio program. The sounds were detected by the Solar and Heliospheric Observatory (SOHO) spacecraft. The physicist addresses why the sun's sounds are not audible on Earth. Scientists analyze solar sound waves to learn more about our turbulent sun. The radio program, which is from the Pulse of the Planet show, is available here in text and audio formats. Copyright 2005 Eisenhower Nationa
Units and Cylinder Volume
Find the volume and surface area of a cylindical storage tank with a radius of 15 feet and a height of 30 feet.
History topics: Babylonian mathematics
This website contains an overview of Babylonian mathematics, with links to in-depth analyses of Babylonian numerals and Pythagoras?s theorem in Babylonian mathematics. The history of zero covers Mesopotamia, Greece, India, the Mayan people in Central America, China, and Europe. Links also give access to bibliographies of mathematicians, such as Cardan, Ch'in, Bhaskara, and Brahmagupta. Examples of written numbers using the cuneiform symbols in the sexigesimal system are included. Other terms: al
This page contains links to one pagers on historical instruments of astronomy with photos of the following : Astronomy Slides, Celestial Globe, Cometarium, Globe, Gregorian Telescope, Kepler's Laws Demonstration, Orrery, Planetarium, Planisphere, Stereoscopic Pictures of the Moon, Tellurian, and Transit.
Sunlight and the Earth : Climate and Weather
These web pages trace the processes involved in the suns impact on weather. This is an exploration of the importance of radiation and reflection of light, both visible and infra-red, and the greenhouse effect. Convection and the role of water vapor are also considered. Global-scale air flows are described, explaining why wind in the continental US usually blows from the west, while near the equator it comes from the east.
Waves and Wave Motion : Describing Waves
This module introduces the history of wave theories, basic descriptions of waves and wave motion, and the concepts of wave speed and frequency.
Project Atmosphere Canada: Teacher's Guide
This teacher's guide from Project Atmosphere Canada is designed to promote an interest in meteorology among young people, and to encourage and foster the teaching of the atmospheric sciences and related topics in Canada. Topics include weather hazards such as hurricanes and thunderstorms; the use of radar and satellites in weather prediction; weather phenomena such as El Nino, wind patterns, high and low pressure, and clouds; sunlight, water vapor, and the upper atmopshere; and others. Each modu
Histogram (grades 6-8)
This virtual manipulative enables the student to construct histograms to summarize data. A histogram divides the range of values in a data set into intervals. Each interval is shown as a rectangle whose area represents the percentage of data values in the interval. Students enter data into a table and the manipulative displays histogram and notes minimum and maximum data values, median and average, number in the data set, and standard deviation. The interval width is adjustable and displayed. Fe
Gravity Gets You Down
This site has students understanding that: 1) Without air resistance, all objects would fall at the same acceleration, regardless of mass. 2) Gravity is the force that causes objects to fall. 3) Air resistance, a type of friction, works against gravity to decrease the acceleration of a falling object. Included in this two day lesson plan are the objectives, needed materials, procedures, adaptations for older students, discussion questions, a rubric for assessment, extension activities, suggested
Quick take on the wide, wide world of geometry
As the social studies, art, and music classes in the middle school widen students horizons, some of your students may become fascinated with the art, costumes, and customs of other peoples in this and other times. The NCTM Principles and Standards calls for middle school students to be able to recognize and apply geometric ideas and relationships in areas outside the mathematics classroom, such as art, science, and everyday life.
Quick take on safety in the science classroom
With the increasing emphasis on hands-on instruction, it becomes more important than ever before for science teachers to be knowledgeable about laboratory safety issues. The National Science Education Standards say that students should have frequent opportunities to use a wide range of equipment, materials, supplies, and other resources for experimentation and direct investigation of phenomena. The National Science Teachers Association recommends that a minimum of 80 percent of science instructi
Grapher : number and operations (grades 6-8)
Using this online manipulative, students can graph one to three functions in the same window, trace the function paths to see coordinates, and zoom in on a region of the graph. Function parameters can be varied as can the domain and range of the display. Tabs allow the student to incorporate fractions, powers, and roots into their functions. Instructions for using the manipulative and a link to the National Council of Teachers of Mathematics (NCTM) standard for number and operations are included