PhET: Free online physics, chemistry, biology, earth science and math ...
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!
Build an Atom
Explore atomic structure and isotopes by building atoms with protons, neutrons, and electrons in this interactive simulation.
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 …
Build a Molecule
Build a Molecule
Balancing Chemical Equations
Balancing Chemical Equations
States of Matter
States of Matter
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 …
States of Matter: Basics
States of Matter: Basics
Build a Molecule
Build molecules from atoms, view them in 3D, and explore molecular structures with this interactive simulation.