Three billion years ago single-celled underwater bacteria used sunlight to convert carbon dioxide and water into tiny oxygen bubbles. Soon plants were turning an atmosphere full of volcanic carbon dioxide into oxygen. As we learn in this video segment from Interactive NOVA: "Earth," photosynthesis created a good home for animals and humans, though not for some primitive organisms. They had to retreat to where oxygen couldn't reach them. Join researchers as they search for these organisms, now considered tiny time capsules from a time before there was oxygen on Earth.

This lesson integrates science into the language arts block. Students will read about plant life cycle events and then write their own books about the life cycle of a plant.

(You can use the CHAPTERS feature below and skip to desirable section of the lesson.)Welcome to BZBumbleBee! This is a Life Science curriculum, made especial...

In this video segment adapted from NOVA, scientists are startled to discover evidence for the three key ingredients for life on Saturn's moon Enceladus.

This is an introductory text intended for a one-year introductory course of the type typically taken by biology majors, or for AP Physics 1 and 2. Algebra and trig are used, and there are optional calculus-based sections. .

Objectives:
The students will be able to explain the characteristics of the rainforest biome.
The students will be able to describe the plants and animals of the rainforest biome.
The students will be able to describe the four layers of the rainforest.
The students will be able to locate rainforests on a map.

AIDS emerged as a health crisis in the 1980's and early 1990's. While many Americans initially associated the disease with gay men, ignorance about AIDS contributed to its rapid spread, first to intravenous drug users and then to heterosexuals. The lack of information available to people at risk particularly affected health workers like Lorraine Theibaud, a registered nurse at San Francisco General Hospital. Theibaud and her colleagues, fearful about contracting or spreading the disease, were not given adequate information or training on how to protect themselves or their patients. When she discovered safety methods and technology that were not available at her hospital, Theibaud organized health workers to demand access to new safety techniques. Her campaign worked, winning workers new safety training and a permanent monitoring committee.

In this 5-lesson unit, students engage in measurement activities involving length, area, volume, time, and weight, using objects, pictures and symbols. Students practice measuring using standard and nonstandard units. Some lessons are introduced using children's literature.

In this lesson for grades 3, 4 and 5, students participate in activities in which they focus on patterns and relations that can be developed from the exploration of balance, mass, length of the mass arm, and the position of the fulcrum. The focus of this lesson is determining the position necessary to balance uneven objects and the effect on balance of moving the fulcrum. Printable activity sheets, ideas for implementation and extension are included.

This video from KET traces the energy transformations that occur when coal is burned to produce electricity. Some of the mechanical processes are also described.

This class is a global survey of the great transformation in history known as the "Industrial Revolution." Topics include origins of mechanized production, the factory system, steam propulsion, electrification, mass communications, mass production and automation. Emphasis on the transfer of technology and its many adaptations around the world. Countries treated include Great Britain, France, Germany, the US, Sweden, Russia, Japan, China, and India. Includes brief reflection papers and a final paper.

The Malaysia Sustainable Cities Practicum is an intensive field-based course that brings 15 Graduate / Professional students to Malaysia to learn about and analyze sustainable city development in five cities in Malaysia. The students in the Practicum will help determine the extent to which these efforts have been successful. They will identify specific projects or policy-making efforts that the following year’s cohort of International Visiting Scholars can examine more closely. " Lead Faculty Professor Larry Susskind Teaching Assistants Jessica Gordon Yasmin Zaerpoor Administrative Staff Takeo Kuwabara Selmah Goldberg

This video adapted from NASA explains how a magnetometer determines magnetic fields around planets.

Alexander Graham Bell first exhibited his telephone at the Centennial Exposition in Philadelphia in 1876, but many people were initially dubious about the utility of Bell's invention. Nevertheless, by the mid-1890s, about 300,000 phones were in use and by World War I, the number reached 10.5 million. Learning to use this new device, Americans wondered what to say to start a telephone conversation. Bell's choice for an initial greeting was "Ahoy." Others argued for more formal greetings like "What is wanted?" or "Are you there?" In 1877, Thomas Alva Edison, the famous inventor who developed the first practical telephone transmitter, solved the problem by introducing "Hello!" as the standard English telephone greeting. The word had been around for a little while--Twain had even used it in Tom Sawyer --but why Edison chose to use it is not known. Whatever the derivation, "hello" had become standard by 1880 when Mark Twain used it in this comic sketch, "A Telephonic Conversation."

Railroads were among the earliest U.S. industries to apply modern management principles to their operations. Beginning in the 1850s and 1860s, railroads were the first American businesses to have a large number of salaried managers and an internal organizational structure with clear lines of communication, responsibility, and authority. These managerial innovations, standard by the 1880s, were necessary to control a large number of employees and offices scattered over a vast geographical area. With the growing professionalization of railroad management came a burgeoning professional literature. Marshall M. Kirkman wrote prolifically about railroad management. This excerpt from his multi-volume The Science of Railways: Organization and Forces (1896) extolled the virtues of military-like discipline in the running of American railroads.

This simulation provides a realistic virtual mass-and-spring laboratory. Users can explore spring motion by manipulating stiffness of the spring and mass of the hanging weight. Concepts of Hooke's Law and elastic potential energy are further clarified through charts showing kinetic, potential, and thermal energy for each spring. This item is part of a larger collection of simulations developed by the Physics Education Technology project (PhET). The simulations are animated, interactive, and game-like environments in which students learn through exploration. All of the sims are freely available from the PhET website for incorporation into classes.

In this three-lesson unit, students participate in activities in which they focus on connections between mathematics and children’s literature. Three pieces of literature are used to teach geometry and measurement topics in the mathematics curriculum, i.e. using and describing geometric figures, estimating the volume of an irregular solid, and exploring the need for a standard unit of length. Activity worksheets and ideas for extension are included.

In this unit plan students apply their knowledge of data collection, display, and analysis to create a plan for improving the environment. Each of the four lessons in this unit requires students to collect data about recyclable materials and display the data for analysis. Each lesson includes students worksheets (PDF), discussion questions, and extension ideas.

You may not think about it, but size does matter. It is especially true when talking about the very tiny things that exist in the nano world.

In the Cold War period of the 1950s and early 1960s, an era in which married life was often idealized as essential for personal happiness and success, non-conformance became a social problem in need of study and explanation. Experts in social science fields of psychology and sociology, and commentators in the popular press conducted research and published findings that sought to account for the relatively large numbers of men and women who remained unmarried despite societal pressures to wed. In this sequel to an earlier article on unmarried women, Look magazine writer Eleanor Harris, in response to suggestions of readers, addressed the topic of bachelorhood by presenting testimonies of selected men on the reasons they remained unmarried and conclusions of authorities regarding these explanations. The divergent ways that the two articles presented their subjects revealed some gender biases of the period. Unmarried women were depicted as "depressed" or "frantic," while single men were typed as "fixated on a mother figure," inclined to "antiresponsibility," or "latent homosexuals." Men often failed to find the "perfect" woman; women frequently could not find even an "eligible" man. Ultimately, the articles portrayed the unwed female's predicament far more portentously than the male's: women were "likely to get stranded" if they waited too long to get married, but it was "never too late" for men.