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PheT Interactives

Free science and math simulations for teaching STEM topics, including physics, chemistry, biology, and math, from University of Colorado Boulder.

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Fractions: Mixed Numbers
Unrestricted Use
CC BY
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Explore fractions while you help yourself to 1 and 1/2 chocolate cakes and wash it down with 1/3 a glass of water! Create your own fractions using fun interactive objects. Match shapes and numbers to earn stars in the mixed number game. Challenge yourself on any level you like. Try to collect lots of stars!

Subject:
Mathematics
Ratios and Proportions
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Date Added:
03/06/2019
Friction
Unrestricted Use
CC BY
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Learn how friction causes a material to heat up and melt. Rub two objects together and they heat up. When one reaches the melting temperature, particles break free as the material melts away.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
Michael Dubson
Mindy Gratny
Wendy Adams
Date Added:
06/01/2004
Friction (AR)
Unrestricted Use
CC BY
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Learn how friction causes a material to heat up and melt. Rub two objects together and they heat up. When one reaches the melting temperature, particles break free as the material melts away. Arabic Language.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
Michael Dubson
Mindy Gratny
Wendy Adams
Date Added:
06/02/2008
Gas Properties (AR)
Unrestricted Use
CC BY
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Pump gas molecules to a box and see what happens as you change the volume, add or remove heat, change gravity, and more. Measure the temperature and pressure, and discover how the properties of the gas vary in relation to each other.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Danielle Harlow
Jack Barbera
Kathy Perkins
Linda Koch
Michael Dubson
Ron LeMaster
Date Added:
07/02/2009
Gene Expression - The Basics
Unrestricted Use
CC BY
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0.0 stars

Express yourself through your genes! See if you can generate and collect three types of protein, then move on to explore the factors that affect protein synthesis in a cell.

Subject:
Genetics
Life Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Ariel Paul
George Emanuel
John Blanco
Kathy Perkins
Mike Klymkowsky
Tom Perkins
Date Added:
08/20/2012
Gene Machine: The Lac Operon
Unrestricted Use
CC BY
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Build a gene network! The lac operon is a set of genes which are responsible for the metabolism of lactose in some bacterial cells. Explore the effects of mutations within the lac operon by adding or removing genes from the DNA.

Subject:
Genetics
Life Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
George Spiegelman
Jared Taylor
John Blanco
Kathy Perkins
Noah Podolefsky
Date Added:
05/01/2010
Gene Machine: The Lac Operon (AR)
Unrestricted Use
CC BY
Rating
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Build a gene network! The lac operon is a set of genes which are responsible for the metabolism of lactose in some bacterial cells. Explore the effects of mutations within the lac operon by adding or removing genes from the DNA.

Subject:
Genetics
Life Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
George Speigelman
Jared Taylor
John Blanco
Kathy Perkins
Noah Podolefsky
Date Added:
05/01/2010
Generator
Unrestricted Use
CC BY
Rating
0.0 stars

Generate electricity with a bar magnet! Discover the physics behind the phenomena by exploring magnets and how you can use them to make a bulb light.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Archie Paulson
Carl Wieman
Chris Malley
Danielle Harlow
Kathy Perkins
Michael Dubson
Date Added:
04/01/2008
Geometric Optics
Unrestricted Use
CC BY
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0.0 stars

How does a lens form an image? See how light rays are refracted by a lens. Watch how the image changes when you adjust the focal length of the lens, move the object, move the lens, or move the screen.

Subject:
Geometry
Mathematics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Danielle Harlow
Kathy Perkins
Michael Dubson
Mindy Gratny
Date Added:
07/13/2008
Graphing Lines
Unrestricted Use
CC BY
Rating
0.0 stars

Explore the world of lines. Investigate the relationships between linear equations, slope, and graphs of lines. Challenge yourself in the line game!

Subject:
Mathematics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Ariel Paul
Chris Malley
Karina Hensberry
Kathy Perkins
Patricia Loeblein
Date Added:
02/07/2013
Gravity Force Lab
Unrestricted Use
CC BY
Rating
0.0 stars

Visualize the gravitational force that two objects exert on each other. Change properties of the objects in order to see how it changes the gravity force.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Noah Podolefsky
Sam Reid
Trish Loeblein
Date Added:
11/12/2010
Gravity Force Lab (AR)
Unrestricted Use
CC BY
Rating
0.0 stars

Visualize the gravitational force that two objects exert on each other. Change properties of the objects in order to see how it changes the gravity force.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Noah Podolefsky
Patricia Loblein
Sam Reid
Date Added:
02/02/2013
Gravity and Orbits
Unrestricted Use
CC BY
Rating
0.0 stars

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
Gravity and Orbits (AR)
Unrestricted Use
CC BY
Rating
0.0 stars

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
Patricia Loblein
Sam Reid
Date Added:
02/07/2011
The Greenhouse Effect
Unrestricted Use
CC BY
Rating
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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
Rating
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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
Rating
0.0 stars

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
Isotopes and Atomic Mass (AR)
Unrestricted Use
CC BY
Rating
0.0 stars

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
Patricia Loblein
Robert Parson
Sam Reid
Date Added:
05/13/2011
John Travoltage
Unrestricted Use
CC BY
Rating
0.0 stars

Make sparks fly with John Travoltage. Wiggle Johnnie's foot and he picks up charges from the carpet. Bring his hand close to the door knob and get rid of the excess charge.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Sam Reid
Wendy Adams
Date Added:
06/01/2004
Ladybug Motion 2D
Unrestricted Use
CC BY
Rating
0.0 stars

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