Chemical Equation Balancer
Practice balancing chemical equations by adjusting coefficients. A live atom-count table shows whether reactants and products are in balance.
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Bohr-Rutherford Diagram
Build atoms by adding protons, neutrons, and electrons. The nucleus and electron shells update live, and the element name, mass, and charge are shown automatically.
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Static Electricity
Rub balloons, fur, glass rods, and more against each other to transfer electrons. Watch charged objects attract and repel, ground charges, and deflect an electroscope.
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Ray Diagram Simulator
Explore how lenses and mirrors form images by tracing light rays. Drag the object and focal points to see real and virtual images appear in real time.
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pH Indicator Lab
Drag household substances into a 12-well spot plate, then apply pH indicators to observe colour changes. Use the digital pH meter to measure any well directly.
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Forest Succession
Walk through a living landscape as ecological succession unfolds over centuries. Pioneer weeds give way to scrub, then woodland, then ancient forest. Click to learn, eat to survive — and when you die, you become part of the forest.
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