Try our new Balancing Chemical Equations sim.
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!
After more student testing, we’ve improved the Buoyancy sim. And, don’t forget that you can lift the blocks out of the water by using the underwater scale.
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.
Insert channels in a membrane and see what happens. See how different types of channels allow particles to move through the membrane.
Wow! We are so excited to announce that we now have over 100 sims at our website. And, look for more to come.
Learn about collisions by playing air hockey! Set up your own experiments: vary the number of discs, masses and initial conditions. Is momentum conserved? Is kinetic energy conserved? Vary the elasticity and see what happens.
Do you ever wonder how a greenhouse gas affects the climate, or why the ozone layer is important? Use the new Molecules and Light sim to explore how light interacts with molecules in our atmosphere.
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!
When will objects float and when will they sink? Learn how buoyancy works with blocks. Arrows show the applied forces, and you can modify the properties of the blocks and the fluid.
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.
