Continental Crust Mass Balance Calculation
This problem set is designed for a junior/senior level course and addresses several quantitative skills that are important in geochemistry and petrology. The exercise uses geochemical data for average quartz monzonite and diorite from the Mineral Mountains in Utah. The students do mass balance calculations and are asked to relate their calculations to continental crust formation. The activity was peer reviewed by participants at the 2004 Teaching Quantitative Skills in a Geoscience Context Works
Author(s): No creator set

License information
Related content

Masses & Springs
A realistic mass and spring laboratory. Hang masses from springs and adjust the spring stiffness and damping. You can even slow time. Transport the lab to different planets. A chart shows the kinetic, potential, and thermal energy for each spring.
Author(s): No creator set

License information
Related content

Dinosaurs
This site helps students answer questions about dinosaurs: What makes a dinosaur a dinosaur? Where did they live? What caused their mass extinction? Students can participate in a virtual dinosaur discovery, follow milestones in dinosaur evolution, and see behind-the-scenes slide-shows of the lab environment where vertebrate specimens are prepared for exhibits and research.
Author(s): No creator set

License information
Related content

Inelastic Collision of Particles with Structure Model
The EJS Inelastic Collision of Particles with Structure model displays the inelastic collision between two equal "particles" with structure on a smooth horizontal surface. Each particle has two microscopic elements which interact through a massless spring of stiffness k and natural length L. The mass of one of the microscopic elements and the spring length of the connector spring can be changed via textboxes. You can modify this simulation if you have EJS installed by right-clicking within the p
Author(s): No creator set

License information
Related content

Anisotropic Oscillator Model
The EJS Anisotropic Oscillator model displays the dynamics of a mass connected to two opposing springs. The simulation displays the motion of the mass as well as the trajectory plot. The initial position of the mass can be changed by dragging. The unstretched lengths of the springs can changed as well via textboxes.
Author(s): No creator set

License information
Related content

Baton Throw Model
The EJS Baton Throw model displays a baton thrown up in the air about its center of mass. The baton is modeled by two masses separated by massless rigid rod. The path of the center of mass of the baton and the red mass are shown in black and red, respectively. The ratio of the two masses can be set via a slider and the initial velocity of the center of mass of the baton and the rotational velocity of the baton can be set via text boxes.
Author(s): No creator set

License information
Related content

Spring Pendulum Model
The EJS Spring Pendulum model displays the model of a hollow mass that moves along a rigid rod that is also connected to a spring. The mass, therefore, undergoes a combination of spring and pendulum oscillations. The initial position and velocities, as well as the spring constant can be changed via textboxes.
Author(s): No creator set

License information
Related content

Pendulum on an Accelerating Train Model
The EJS Pendulum on an Accelerating Train model displays the model of a pendulum on an accelerating train. The problem assumes that the pendulum rod is rigid and massless and of length, L = 2, and the pendulum bob is of mass, m = 1. The initial pendulum angle and the initial velocity of the train can be changed via textboxes, and the acceleration of the train can be changed via a slider.
Author(s): No creator set

License information
Related content

Lennard-Jones Potential Model
The EJS Lennard-Jones Potential model shows the dynamics of a particle of mass m within this potential. You can drag particle to change its position and you can drag the energy-line to change its total energy. The Lennard-Jones potential function is a reasonably accurate model of interactions between noble gas atoms.  The binding energy epsilon is the depth of the potential well and minimum molecular separation are set equal to unity.  This simulation uses uses a natural system of units the m
Author(s): No creator set

License information
Related content

Modeling a Changing World
Modeling a Changing World written by mathematics professor Tim Chartier and his student Nick Dovidio presents curricular material in an OSP Launcher package to motivate the need for numerically solving ordinary differential equations. The package discusses such applications as a mass-spring system and its connection to computer simulation for movies. An interactive model that simulates a two-body gravitational model of the moon and earth allows for exploring the topic of numerical error. Other m
Author(s): No creator set

License information
Related content

Body With Thruster Model
The Body with Thruster Model shows the motion of a disk with an attached rocket engine. You can drag the engine to change its distance from the center of the disk and you can adjust the thrust of the rocket engine using sliders. The mass of the rocket and its connecting rod are assumed to be negligible. The trajectory of this single-body model is intuitively challenging and difficult to visualize.
Author(s): No creator set

License information
Related content

Letters From the Diaspora - Writing Letters From the Perspective of a Historic Migrant
In this lesson, students share opinions about the causes of mass migration. They then investigate the causes and effects of an event that led to a mass migration, and write letters from the perspective of a person who might have lived through that period.
Author(s): No creator set

License information
Related content

International Experience in Regard to Procedures for Settling Conflicts Relating to Copyright in the
Description not set
Author(s): Benyekhlef, Karim,Gélinas, Fabien

License information
Related content

Rights not set

Foto: Modernity in Central Europe, 1918-1945
During and directly after World War I, four great empires (Germany, Austro-Hungary, Russia, and the Ottomans) crumbled precipitously, to be replaced by more than one dozen fledgling nation-states. The largely agrarian, in some cases semifeudal, societies of central Europe were thrust nearly overnight into crises of civil war, unemployment, or inflation — and beyond these crises into a world propelled by mass media and consumer economies. Becoming modern was attractive but also anxiety-provokin
Author(s): No creator set

License information
Related content

NASA CONNECT Better Health from Space to Earth
In NASA CONNECT Better Health From Space to Earth, students will learn about the importance of good nutrition and exercise. They will investigate what we can learn in space about our bodies here on Earth. Students will see how researchers and scientists apply the mathematics concepts of measurement and estimation to study the loss of calcium in bones and the loss of muscle mass while astronauts are living and working in space. Grades 6-8.
Author(s): No creator set

License information
Related content

Peace Games: Peace Dove
Play a game and find out about a Nobel Prize awarded discovery or work! Several people and organizations have received the Nobel Peace Prize for their efforts concerning nuclear weapons disarmament. Worldwide, the white dove is a symbol for peace. Take on the mission to disarm the world of nuclear weapons! You have eight "Peace Doves" to help you, each able to disarm one of the eight countries possessing nuclear weapons.
Author(s): No creator set

License information
Related content

Mixed Reception Scenario
This activity is set in a research group that is developing an antivenom for spider bites. In the opening scene, Nelson Pogline, a talented graduate student, dies unexpectedly at a university reception. As a detective, you must use chemistry concepts to determine if this was murder and if so, solve the case. You can interview suspects using Quicktime movies, investigate the crime scene for clues with Quicktime Virtual Reality images, and analyze the evidence from the crime lab. This activity req
Author(s): No creator set

License information
Related content

Essential Science for Teachers: Physical Science Session 3. Physical Changes and Conservation of Mat
What happens when sugar is dissolved in a glass of water or when a pot of water on the stove boils away? Do things ever really "disappear"? In everyday life, observations that things "disappear" or "appear" seem to contradict one of the fundamental laws of nature: matter can be neither created nor destroyed. In this session, participants learn how the principles of the particle model are consistent with conservation of matter.,The segment shows the interviewer trying to find out the student's id
Author(s): Harvard-Smithsonian Center for Astrophysics

License information
Related content

Corporation for Public Broadcasting "All Rights Reserved"

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"