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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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States of Matter (AR)
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
Patricia Loblein
Paul Beale
Sarah McKagan
Wendy Adams
Date Added:
11/01/2008
States of Matter Basics
Unrestricted Use
CC BY
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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
Stern-Gerlach Experiment
Unrestricted Use
CC BY
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The classic Stern-Gerlach Experiment shows that atoms have a property called spin. Spin is a kind of intrinsic angular momentum, which has no classical counterpart. When the z-component of the spin is measured, one always gets one of two values: spin up or spin down.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Carl Wieman
Michael Dubson
Sam McKagan
Date Added:
10/01/2006
Stretching DNA
Unrestricted Use
CC BY
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Explore stretching just a single strand of DNA using optical tweezers or fluid flow. Experiment with the forces involved and measure the relationship between the stretched DNA length and the force required to keep it stretched. Is DNA more like a rope or like a spring?

Subject:
Genetics
Life Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Chris Malley
Kathy Perkins
Meredith Betterton
Mike Dubson
Tom Perkins
Wendy Adams
Date Added:
12/01/2007
Stretching DNA (AR)
Unrestricted Use
CC BY
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Explore stretching just a single strand of DNA using optical tweezers or fluid flow. Experiment with the forces involved and measure the relationship between the stretched DNA length and the force required to keep it stretched. Is DNA more like a rope or like a spring?

Subject:
Genetics
Life Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Chris Malley
Kathy Perkins
Meredith Betterton
Michael Dubson
Thomas Perkins
Wendy Adams
Date Added:
12/01/2007
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
System of Equations - PhET Interactive Simulations
Unrestricted Use
CC BY
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Explore what it means for a mathematical statement to be balanced or unbalanced by interacting with integers and variables on a balance. Find multiple ways to balance x and y to build a system of equations.

Subject:
Mathematics
Material Type:
Activity/Lab
Interactive
Lesson
Lesson Plan
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Amanda Mcgarry
Diana L Pez
PhET at University of Colorado
Date Added:
03/16/2021
Torque
Unrestricted Use
CC BY
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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
Torque (AR)
Unrestricted Use
CC BY
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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
Patricia Loblein
Sam Reid
Wendy Adams
Date Added:
02/02/2012
Vector Addition
Unrestricted Use
CC BY
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Learn how to add vectors. Drag vectors onto a graph, change their length and angle, and sum them together. The magnitude, angle, and components of each vector can be displayed in several formats.

Subject:
Mathematics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Michael Dubson
Mindy Gratny
Date Added:
11/16/2007
Vector Addition (AR)
Unrestricted Use
CC BY
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0.0 stars

Learn how to add vectors. Drag vectors onto a graph, change their length and angle, and sum them together. The magnitude, angle, and components of each vector can be displayed in several formats.

Subject:
Mathematics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Michael Dubson
Mindy Gratny
Date Added:
06/17/2011
Wave on a String
Unrestricted Use
CC BY
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Watch a string vibrate in slow motion. Wiggle the end of the string and make waves, or adjust the frequency and amplitude of an oscillator. Adjust the damping and tension. The end can be fixed, loose, or open.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Danielle Harlow
Michael Dubson
Wendy Adams
Date Added:
05/03/2006
Wave on a String (AR)
Unrestricted Use
CC BY
Rating
0.0 stars

Watch a string vibrate in slow motion. Wiggle the end of the string and make waves, or adjust the frequency and amplitude of an oscillator. Adjust the damping and tension. The end can be fixed, loose, or open.

Subject:
Physical Science
Physics
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Danielle Harlow
Michael Dubson
Wendy Adams
Date Added:
06/02/2008
pH Scale
Unrestricted Use
CC BY
Rating
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Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the relative number of hydroxide ions and hydronium ions in solution. Switch between logarithmic and linear scales. Investigate whether changing the volume or diluting with water affects the pH. Or you can design your own liquid!

Subject:
Chemistry
Physical Science
Material Type:
Activity/Lab
Interactive
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Archie Paulson
Chris Malley
Jack Barbera
Kathy Perkins
Laurie Langdon
Patricia Loeblein
Wendy Adams
Date Added:
07/01/2008
pH Scale (AR)
Unrestricted Use
CC BY
Rating
0.0 stars

Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the relative number of hydroxide ions and hydronium ions in solution. Switch between logarithmic and linear scales. Investigate whether changing the volume or diluting with water affects the pH. Or you can design your own liquid!

Subject:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Archie Paulson
Chris Malley
Jack Barbera
Kathy Perkins
Laurie Landgon
Patricia Loblein
Wendy Adams
Date Added:
07/02/2012