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Gravity and Orbits
Unrestricted Use
CC BY
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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:
Astronomy
Physical Science
Physics
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
Sam Reid
Trish Loeblein
Date Added:
02/07/2011
The Greenhouse Effect
Unrestricted Use
CC BY
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How do greenhouse gases affect the climate? Explore the atmosphere during the ice age and today. What happens when you add clouds? Change the greenhouse gas concentration and see how the temperature changes. Then compare to the effect of glass panes. Zoom in and see how light interacts with molecules. Do all atmospheric gases contribute to the greenhouse effect?

Subject:
Atmospheric Science
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
John Blanco
Kathy Perkins
Kelly Lancaster
Robert Parson
Ron LeMaster
Trish Loeblein
Wendy Adams
Date Added:
11/15/2007
Improper Fraction - PhET Interactive Simulations
Unrestricted Use
CC BY
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Build equivalent fractions with different denominators. Match shapes and numbers to earn stars in the game. Challenge yourself on any level you like. Try to collect lots of stars!

Subject:
Mathematics
Material Type:
Activity/Lab
Lesson
Lesson Plan
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Diana L Pez
Francisco Vilar Vasconcelos Raphael Alves Feitosa
Isadora Siqueira
Janelle Stanton
Leidiane Peixoto
Lilian Silva
Mait Vitorino E Nayara Voigt
PhET at University of Colorado
Sherene Irvine
Traducci N Mayra Tavares
Trish Loeblein
Date Added:
03/12/2021
Isotopes and Atomic Mass
Unrestricted Use
CC BY
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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:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Emily Moore
John Blanco
Kathy Perkins
Kelly Lancaster
Robert Parson
Sam Reid
Trish Loeblein
Date Added:
07/18/2011
Ladybug Motion 2D
Unrestricted Use
CC BY
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Learn about position, velocity and acceleration vectors. Move the ladybug by setting the position, velocity or acceleration, and see how the vectors change. Choose linear, circular or elliptical motion, and record and playback the motion to analyze the behavior.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Noah Podolefsky
Sam Reid
Trish Loeblein
Wendy Adams
Date Added:
04/01/2009
Molecules and Light
Unrestricted Use
CC BY
Rating
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Do you ever wonder how a greenhouse gas affects the climate, or why the ozone layer is important? Use the sim to explore how light interacts with molecules in our atmosphere.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
John Blanco
Kathy Perkins
Kelly Lancaster
Robert Parson
Trish Loeblein
Date Added:
10/01/2010
Normal Modes
Unrestricted Use
CC BY
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Play with a 1D or 2D system of coupled mass-spring oscillators. Vary the number of masses, set the initial conditions, and watch the system evolve. See the spectrum of normal modes for arbitrary motion. See longitudinal or transverse modes in the 1D system.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Ariel Paul
Jon Olson
Michael Dubson
Trish Loeblein
Date Added:
05/14/2012
Pendulum Lab
Unrestricted Use
CC BY
Rating
0.0 stars

Play with one or two pendulums and discover how the period of a simple pendulum depends on the length of the string, the mass of the pendulum bob, and the amplitude of the swing. It's easy to measure the period using the photogate timer. You can vary friction and the strength of gravity. Use the pendulum to find the value of g on planet X. Notice the anharmonic behavior at large amplitude.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Michael Dubson
Trish Loeblein
Date Added:
10/27/2008
The Ramp
Unrestricted Use
CC BY
Rating
0.0 stars

Explore forces, energy and work as you push household objects up and down a ramp. Lower and raise the ramp to see how the angle of inclination affects the parallel forces acting on the file cabinet. Graphs show forces, energy and work.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
Kathy Perkins
Sam Reid
Trish Loeblein
Wendy Adams
Date Added:
10/05/2006
Ramp: Forces and Motion
Unrestricted Use
CC BY
Rating
0.0 stars

Explore forces and motion as you push household objects up and down a ramp. Lower and raise the ramp to see how the angle of inclination affects the parallel forces. Graphs show forces, energy and work.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Kathy Perkins
Noah Podolefsky
Sam Reid
Trish Loeblein
Date Added:
10/01/2010
Reactions & Rates
Unrestricted Use
CC BY
Rating
0.0 stars

Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? What affects the rate of a reaction?

Subject:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Kathy Perkins
Linda Koch
Mindy Gratny
Ron LeMaster
Trish Loeblein
Date Added:
11/15/2007
Salts & Solubility
Unrestricted Use
CC BY
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Add different salts to water, then watch them dissolve and achieve a dynamic equilibrium with solid precipitate. Compare the number of ions in solution for highly soluble NaCl to other slightly soluble salts. Relate the charges on ions to the number of ions in the formula of a salt. Calculate Ksp values.

Subject:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Danielle Harlow
Kathy Perkins
Linda Koch
Ron LeMaster
Trish Loeblein
Wendy Adams
Date Added:
04/01/2006
States of Matter
Unrestricted Use
CC BY
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Watch different types of molecules form a solid, liquid, or gas. Add or remove heat and watch the phase change. Change the temperature or volume of a container and see a pressure-temperature diagram respond in real time. Relate the interaction potential to the forces between molecules.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
John Blanco
Kathy Perkins
Noah Podolefsky
Paul Beale
Sarah McKagan
Trish Loeblein
Wendy Adams
Date Added:
07/18/2011
States of Matter Basics
Unrestricted Use
CC BY
Rating
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Heat, cool and compress atoms and molecules and watch as they change between solid, liquid and gas phases.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Emily Moore
John Blanco
Kathy Perkins
Noah Podolefsky
Paul Beale
Sarah McKagan
Trish Loeblein
Wendy Adams
Date Added:
11/14/2011
Sugar and Salt Solutions
Unrestricted Use
CC BY
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What happens when sugar and salt are added to water? Pour in sugar, shake in salt, and evaporate water to see the effects on concentration and conductivity. Zoom in to see how different sugar and salt compounds dissolve. Zoom in again to explore the role of water.

Subject:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Emily Moore
Julia Chamberlain
Kathy Perkins
Kelly Lancaster
Robert Parson
Sam Reid
Trish Loeblein
Date Added:
10/12/2011
Torque
Unrestricted Use
CC BY
Rating
0.0 stars

Investigate how torque causes an object to rotate. Discover the relationships between angular acceleration, moment of inertia, angular momentum and torque.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Kathy Perkins
Sam Reid
Trish Loeblein
Wendy Adams
Date Added:
02/01/2008