Essential Science for Teachers: Physical Science
In-depth interviews with children that uncover their ideas about the topic at hand.,In this segment the interviewer uses a model to represent what is happening when substances dissolve in water, as well as a representation of two different solutions. The interviewer then asks for a prediction of what would happen when two clear solutions are mixed together. The interviewer uses the model to help the student build an understanding of what happened to form the precipitate. The student also changed
Author(s): Harvard-Smithsonian Center for Astrophysics

License information
Related content

Corporation for Public Broadcasting "All Rights Reserved"

Essential Science for Teachers: Earth and Space Science
In-depth interviews with children that uncover their ideas about the topic at hand.,This video segment is helpful in showing how th einterviewer uses the phenomenon of the Hawaiian Islands formation to probe for the student's ideas about volcanoes and how volcanoes form land masses such as the islands. She draws a picture to explain her idea and then draws a different picture. The interviewer uses this to probe further by asking her why she changed her mind. He also tries to get her to think abo
Author(s): Harvard-Smithsonian Center for Astrophysics

License information
Related content

Corporation for Public Broadcasting "All Rights Reserved"

Essential Science for Teachers: Earth and Space Science
In-depth interviews with children that uncover their ideas about the topic at hand.,This segment is helpful in showing teachers a useful technique to elicit students' ideas. The interviewer uses a refutation by stating a comment about what some scientists believe and asks the student to describe what she would say to them to refute their claim.
Author(s): Harvard-Smithsonian Center for Astrophysics

License information
Related content

Corporation for Public Broadcasting "All Rights Reserved"

Guilford Courthouse National Military Park
describes weapons, medicine, food, leisure hours, and the role of women in the Revolutionary War. It also examines the battle that was the largest of the Southern Campaign and that helped change the course of the war.
Author(s): No creator set

License information
Related content

GasLab
This is a series of computer animations which demonstrate all the possible combinations of the ideal gas law or equation of state. Gases have various properties which we can observe with our senses, including the gas pressure, temperature, mass, and the volume which contains the gas. Careful, scientific observation has determined that these variables are related to one another and the values of these properties determine the state of the gas. In a scientific manner, we can fix any two of the fou
Author(s): No creator set

License information
Related content

Catapults!
Students observe the relationship between the angle of a catapult (a force measurement) and the flight of a cotton ball. They learn how Newton's second law of motion works by seeing directly that F = ma. When they pull the metal "arm" back further, thus applying a greater force to the cotton ball, it causes the cotton ball to travel faster and farther. Students also learn that objects of greater mass require more force to result in the same distance traveled by a lighter object.
Author(s): Integrated Teaching and Learning Program,

License information
Related content

Copyright 2011 - Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder,http://www.teachengineering.org/policy_ipp.php

Changing Military Doctrine
General Pierre-Marie Gallois, often regarded as the 'father' of the French nuclear strategy, served with the Supreme Headquarters Allied Powers Europe (SHAPE) and with French president Charles de Gaulle. In this video segment, Gallois provides a perspective that was shared by many Europeans, including General de Gaulle: that to replace the strategy of 'massive retaliation' with 'flexible response' meant a weakening of the United States' commitment to defend Europe with nuclear weapons. In his in
Author(s): No creator set

License information
Related content

Human Security in an Age of Turbulence
Mary Kaldor is a prolific author who has written widely on a range of key issues over the years ranging from the 'Baroque Arsenal' (1982) a study that challenged the logic of militarism and the belief that more weapons meant more security, through to her groundbreaking 'New Wars'(1999) a book that reveals the new forms that organized violence will take in the 21st century. Mary Kaldor today is one of the most influential and respected alternative voices in the field of applied international poli
Author(s): No creator set

License information
Related content

Can we eliminate nuclear weapons?
Twenty years after the fall of the Berlin Wall is the time finally right to achieve the elimination of nuclear weapons? Leading proponents of nuclear disarmament discuss why achieving Global Zero – a world without nuclear weapons – is both necessary and realistic.
Author(s): No creator set

License information
Related content

Roze in beeld
rozeinbeeld.png

Website die de geschiedenis van homoseksualiteit in de Nederlandse media in beeld brengt. Je vindt op de website een tijdlijn die letterlijk per jaar aan de hand van beeldmateriaal deze geschiedenis toont. Verder vind je er ook nog de film …


Author(s): No creator set

License information
Related content

Weapons of Mass Confusion: Assessing the True Risks
Panelists gathered for this discussion agree that when setting weapons policy it is counterproductive to lump weapons together. The dangers from nuclear, biological, and chemical weapons need to understood individually. Owen Cote says nuclear weapons, with their large-scale production process and instant lethal capacity, belong in one categ
Author(s): No creator set

License information
Related content

Bomb Scare: The History and Future of Nuclear Weapons
Joseph Cirincione delivers an energetic and at times impassioned primer on the standoff with Iran on its nuclear program, drawn in part from his latest book, The History and Future of Nuclear Weapons (Columbia University Press, Spring 2007).

He offers a succinct ‘equation’ to describe what drives nat

Author(s): No creator set

License information
Related content

Can Nuclear Energy and Non-Proliferation Co-Exist?
If nuclear energy becomes a central tool in addressing climate change, will nuclear weapons proliferation inevitably follow? In the words of Matthew Bunn, “The horse ain’t entirely out of the barn—there are still things to do.” He and fellow panelists acknowledge the link between civilian nuclear energy programs
Author(s): No creator set

License information
Related content

Iran: War or Peace?
The Bush administration’s panic about failing in Iraq is now driving its fierce attitude toward Iran, according to Kenneth Pollack. President Bush’s 2007 State of the Union message hinted at exercising military force to deal with an Iran it accused of stoking up insurgency in Iraq. Pollack points out that historically
Author(s): No creator set

License information
Related content

The Next Catastrophe: Reducing Our Vulnerabilities to Natural, Industrial, and Terrorist Disasters
It’s time to trade in the Department of Homeland Security for a Department of Homeland Vulnerabilities, says Charles Perrow. At its peril, our nation “privileges terrorism over natural and industrial disasters.”

From Perrow’s perspective, the U.S. landscape is riddled with “weapons of mass destruction:

Author(s): No creator set

License information
Related content

An Evening with Video Artist Bill Viola
Bill Viola dims the lights in MIT’s Room 10-250, and begins to talk of life, death and all that lies between, leaving the realm of classroom and entering a place of potential enlightenment. Weaving together his video art, personal anecdotes, poetry and other writings from religious traditions spanning the globe and the ages, V
Author(s): No creator set

License information
Related content

Just Back from Iraq: Observations of a Weapons Inspector
Rocco Casagrande was the chief of the Biological Analysis Lab for the UN Monitoring, Verification and Inspection Commission (UNMOVIC) from December 2002 to March 2003. He gives a detailed account of the daily activities of inspectors, and the processes involved in determining, for example, if a brewery is really a brewery, or a front for chemica
Author(s): No creator set

License information
Related content

Sustainable Accessibility: A Grand Challenge for the World and for MIT
Transportation systems, as we know them today, will simply not sustain the worlds’ growing population. Imagine a projected population of nine billion individuals. If this future population had mobility patterns like drivers in the United States, there would be a staggering 7.6 billion motor vehicles, using 440 million barre
Author(s): No creator set

License information
Related content

2.2 Nuclear fission
The transformation of radioactive uranium and, in some instances, thorium isotopes provides vastly more energy per unit mass of fuel than any other energy source, except nuclear fusion, and therein lies its greatest attraction. The unit considers the advantages and limitations of generating this power and the environmental and security issues that the process raises.
Author(s): The Open University

License information
Related content

Licensed under a Creative Commons Attribution - NonCommercial-ShareAlike 2.0 Licence - see http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ - Original copyright The Open University

2.1 Introduction
The transformation of radioactive uranium and, in some instances, thorium isotopes provides vastly more energy per unit mass of fuel than any other energy source, except nuclear fusion, and therein lies its greatest attraction. The unit considers the advantages and limitations of generating this power and the environmental and security issues that the process raises.
Author(s): The Open University

License information
Related content

Licensed under a Creative Commons Attribution - NonCommercial-ShareAlike 2.0 Licence - see http://creativecommons.org/licenses/by-nc-sa/2.0/uk/ - Original copyright The Open University