Radioactive Decay Model
The EJS Radioactive Decay Model simulates the decay of a radioactive sample using discrete random events. It displays the number of radioactive nuclei as a function of time. You can change the initial number of nuclei and the decay constant as well as changing the plot to a semi-log plot.
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Balls in a Box Model
The Balls in a Box model shows a system of particles is very sensitive to its initial conditions. In general, an isolated system of many particles that is prepared in a nonrandom configuration will change in time so as to approach its most random configuration where it is in equilibrium. What happens if we choose the initial conditions in a very special way? The default initial condition corresponds to eight stationary particles perfectly aligned on the x-axis. Two particles approach from the l
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Ejs Wave Representations Model
The EJS Wave Representations model displays two representations of a sinusoidal wave on a string. One shows a movie of the wave traveling along a string - you can think of this representation as a sequence of photographs. The second representation is a plot of the displacement as a function of time for two points on the string (you can select which two points to use). Using only these two representations, you can determine the values of many different parameters that describe the wave.
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La mondialisation - Serge Champeau

Une conférence de l'UTLS au Lycée

La mondialisation par Serge Champeau

Lycée Montdory (63 Thiers)


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Tracing Genetic Ancestry Using DNA Microarrays
In this lesson students will read and discuss an article about genetic ancestry and genetic ancestry testing. 2. Apply knowledge of DNA and heredity to understand DNA microarrays, and concepts of genetic mutation and ancestry tracking. 3. Mimic the function of a DNA microarray used for genetic ancestry analysis by completing a paper-and-pencil activity. 4. Discuss the ethics of genetic testing in medical research.
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Kamchatka: Siberia's Forbidden Wilderness
These lessons are designed for earth science and biology students in middle and high school classrooms, though extension suggestions for older and younger students will allow you to adapt each lesson for younger and older audiences. The lessons are designed to complement the Living Edens: Kamchatka program; each lesson will indicate clips from the program that focus on the topic at hand, though the lessons function equally well as stand-alone content.
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Survival of the Fittest Microbes: Examining the Conditions of One River and the Microbes that Thrive
In this lesson, created for grades 6 - 12, students learn about the harsh conditions of Spain's Rio Tinto River and research the microbes that nonetheless manage to thrive there. They then synthesize their knowledge by creating a reality television program set in the Rio Tinto in which the microbes are the "contestants." The lesson includes an article about the Rio Tinto with accompanying questions, a detailed classroom activity, vocabulary list, discussion questions, extension activities, inter
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Star Library: Regression - Residuals - Why?
As teachers of statistics, we know that residual plots and other diagnostics are important to deciding whether or not linear regression is appropriate for a set of data. Despite talking with our students about this, many students might believe that if the correlation coefficient is strong enough, these diagnostic checks are not important. The data set included in this activity was created to lure students into a situation that looks on the surface to be appropriate for the use of linear regressi
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Environmental Decision Making
Using the Extend 'connect-the-components' visual programming, students can model and simulate ecosystems including social and economic forces as well as study parameter variations to develop an understanding of ecosystem function and productivity. By making 'what if...' changes in the model, the effects of various proposed decisions about the environment can then be shown. EDM includes three ecological systems: Ponds, Grasslands, and Logging. Students can predict results of changes in the mode
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African Droughts
The Horn of Africa has been experiencing exceptional droughts over the last decade. Using data collected from the NOAA POES satellite, changes in the severity of the drought conditions in the Horn and around the world are shown.
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Bering Sea Climate
The Bering Sea Climate website contains time series data that measures climate and ecosystem status in the Bering Sea. The site presents data, metadata, and graphics by allowing the user to select categories and then click a button for the desired function. Data can be displayed as a list, a time series plot, or in terms of recent trends, relevance, and correlation. Measured parameters include weather, oceanographic and climate data, sea ice data, and fisheries and other biological data. The sit
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Patient Communication Skills, 2009
The materials on this page represent a curriculum for teaching effective patient communication to dentistry students. These techniques could be useful for other healthcare providers, as well: medical students, nursing students, public health providers, and in-practice health care providers. There are two main types of resources: performance keys and videos. Performance Keys are text documents that articulate key patient interaction skills, and give examples of more and less effective techniques
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Natural Inquirer Journals: Wildland Fire
This edition of the Natural Inquirer is all about wildland fire. You will learn about the benefits of wildland fire, as well as some of its dangers. You will learn what fire scientists are learning about wildland fire. They are learning, for example, 1) that wildland fire should not be completely eliminated from natural environments, but it should be managed; 2) how to predict which weather conditions most favor a wildfire being started; 3) about the relationship between wildland fires and globa
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Essential Science for Teachers: Earth and Space Science
In-depth interviews with children that uncover their ideas about the topic at hand.,The interviewer identifies the student's ideas about the interior of the earth being made up of hot magma by asking her to draw a picture. When the student mentions volcanoes, the interviewer probes further to ask her to explain what a volcano is.
Author(s): Harvard-Smithsonian Center for Astrophysics

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Essential Science for Teachers: Physical Science: Session 2. The Particle Nature of Matter: Solids,
What simple idea links together all of chemistry and physics? How can a close study of the macroscopic differences among solids, liquids, and gases support a microscopic model of tiny, discrete, and constantly moving particles? In this session, participants learn how the "particle model" can be turned into a powerful tool for generating predictions about the behavior of matter under a wide range of conditions.,This segment shows an example of probing questions about phenomena to find out if the
Author(s): Harvard-Smithsonian Center for Astrophysics

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Earth Exploration Toolbook Chapter: Investigating Earthquakes: GIS Mapping and Analysis
This activity describes the technique of preparing latitude-longitude based data so it can be imported into a geographic information system (GIS). The chapter describes the steps to create a map to display data and guides users through some basic geographic analyses. The focus of the chapter's case study is earthquake prediction. Users download and format near real-time and historical earthquake data from the USGS. They import the data into ArcVoyager Special Edition GIS software, and analyze pa
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Lighting
Learn about forces that causes lighting.
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EngineSim and RangeGames Downloads
EngineSim was developed at the NASA Glenn Research Center in an effort to foster hands-on, inquiry-based learning in science and math. EngineSim is a simulator that models the design and testing of jet engines. The program works in two modes: Design Mode or Tunnel Test Mode. In the Design Mode, you can change design variables including the flight conditions, the engine size, the inlet performance, the turbo machinery compressor and turbine performance, the combustors or burner performance, or th
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Allometry: Size and its consequences or... Why aren't there 20 foot tall ants?
Evolution has resulted in changes in the sizes and forms of organisms. Everything about the biology of an animal, including its physiology, anatomy, and ecology, is influenced by its body size. Frequently there seem to be limits on the sizes that different organisms can attain, even when larger size might be thought to be evolutionarily advantageous. Often an increase or decrease in size is correlated with a change in proportions. Understanding the significance of a particular morphology or inte
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Culturing Experimental Organisms for Use in Teaching Biology
Methods for the collection and the culturing of a variety of experimental organisms used in teaching biology are discussed. The organisms include protozoans, hydra, planaria, vinegar eels, aquatic snails, Daphnia, brine shrimp, frogs, turtles, flesh flies, and Tenebrio. Culturing parameters, overall care, handling, diet, feeding procedures, and specific environmental conditions are examined.
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