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
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!
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 are always right at your fingertips.Become part of our mission today, and transform the learning experiences of students everywhere!
States of Matter - PhET Interactive Simulations
Explore the states of matter with interactive simulations that show how molecules form solids, liquids, and gases.
Circuit Construction Kit: DC - PhET Interactive Simulations
Build and test circuits with batteries, resistors, light bulbs, and switches. Learn about series and parallel circuits, Ohm's law, and conductors and insulators.
My Solar System - PhET Interactive Simulations
Explore the solar system with interactive simulations and learn about the movement of planetary objects.
Gravity and Orbits - PhET Interactive Simulations
Explore gravity and orbits with interactive simulations.
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 on the density and discover the conditions for sinking or floating in water. Play detective to determine the material of each block by comparing its density with the values in the table.
Circuit Construction Kit: DC - PhET Interactive Simulations
Experiment with an electronics kit! Build circuits with batteries, resistors, ideal and non-Ohmic light bulbs, fuses, and switches. Determine if everyday objects are conductors or insulators, and take measurements with an ammeter and voltmeter. View the circuit as a schematic diagram, or switch to a lifelike view.
States of Matter: Basics - Atoms - PhET Interactive Simulations
Heat, cool and compress atoms and molecules and watch as they change between solid, liquid and gas phases.