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Move the sun, earth, moon and space station to see how it affects their gravitational forces and orbital paths. Visualize the sizes and distances between different heavenly bodies, and turn off gravity to see what would happen without it!

Subject:: Earth and Space Systems; Force/Motion/Energy; Science
Material Type:: Simulation
Provider:: University of Colorado Boulder
Provider Set:: PhET Interactive Simulations
Author:: Chris Malley; Emily Moore; John Blanco; Jon Olson; Kathy Perkins; Noah Podolefsky; Patricia Loblein; Sam Reid
Date Added:: 02/07/2011

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Isotopes and Atomic Mass (AR)

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Are all atoms of an element the same? How can you tell one isotope from another? Use the sim to learn about isotopes and how abundance relates to the average atomic mass of an element.

Subject:: Matter; Science
Material Type:: Simulation
Provider:: University of Colorado Boulder
Provider Set:: PhET Interactive Simulations
Author:: Emily Moore; John Blanco; Kathy Perkins; Kelly Lancaster; Patricia Loblein; Robert Parson; Sam Reid
Date Added:: 05/13/2011

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