PhET: Free online physics, chemistry, biology, earth science and …
Free science and math simulations for teaching STEM topics, including physics, chemistry, biology, and math, from University of Colorado Boulder
My Account - PhET Interactive Simulations
By converting our sims to HTML5, we make them seamlessly available across platforms and devices. Whether you have laptops, iPads, chromebooks, or BYOD, your favorite PhET sims …
Build a Molecule - PhET Interactive Simulations
Build molecules from atoms, view them in 3D, and understand molecular structures with this interactive simulation.
Reactions & Rates - Reaction - PhET Interactive Simulations
Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? …
Build an Atom - Atoms - PhET Interactive Simulations
Build an atom out of protons, neutrons, and electrons, and see how the element, charge, and mass change. Then play a game to test your ideas!
Reversible Reactions - PhET Interactive Simulations
How does total energy affect a reaction rate? Vary temperature, barrier height, and potential energies. Record concentrations and time in order to extract rate coefficients. Do temperature …
Concentration - Solutions - PhET Interactive Simulations
Watch your solution change color as you mix chemicals with water. Then check molarity with the concentration meter. What are all the ways you can change the concentration of your solution? …
Balancing Chemical Equations - PhET Interactive Simulations
How do you know if a chemical equation is balanced? What can you change to balance an equation? Play a game to test your ideas!
Molecule Shapes - VSEPR | Lone Pairs - PhET Interactive Simulations
Explore molecule shapes by building molecules in 3D! How does molecule shape change with different numbers of bonds and electron pairs? Find out by adding single, double or triple …
Density - Mass | Volume - PhET Interactive Simulations
Why do some materials like wood float in water, and others don’t? Interact with blocks of different materials, including a custom option by modifying their mass and volume, to explore the effect …