Over 1.5 billion simulations delivered Physics Math & Statistics Chemistry Earth & Space Biology Teaching Resources, Activities, and Community Teachers have access to simulation-specific …

This is an interactive sim. It changes as you play with it.

‪Build a Molecule‬

Create and explore solar systems with interactive simulations, observing gravitational effects and celestial body movements.

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 …

Build your own system of heavenly bodies and watch the gravitational ballet. With this orbit simulator, you can set initial positions, velocities, and masses of 2, 3, or 4 bodies, and then …

‪Gravity and Orbits‬

‪Natural Selection‬

‪States of Matter: Basics‬

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? …