Science concept library

Find concepts by subject

Browse 147 concepts by subject, then try the related experiments.

Physics: 24 concepts

Force and motion, waves, electricity and magnetism, light. Check the rules by which the world operates through simulation.

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Chemistry: 20 concepts

Atoms and molecules, chemical reactions, acids and bases. You can safely mix even dangerous reagents.

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Biology: 20 concepts

Cells, genetics, ecosystem, our body. Observe invisible life phenomena.

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Earth science: 20 concepts

Plate tectonics, weather, phases of the moon, planetary motion. View the large flow of the Earth and the universe in miniature.

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Electronics: 30 concepts

Circuits, semiconductors, signals and logic. Measure current and voltage to explore electronic circuits.

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Energy & Environment: 10 concepts

Explore generation, heat, storage and grids by measuring energy conversion and losses.

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Mechanical Engineering: 12 concepts

Machines, structures, fluids and control. Measure forces and deformation to explore engineering design.

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Computing: 12 concepts

Explore algorithms, data, networks, and AI through visible computation and verification.

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How to use these guides

1. Choose a concept and read its definition in the opening paragraph.
2. Read the key relationships, symbols, units, and conditions together.
3. Use the example to make a prediction, then change one condition at a time in a related experiment.
4. Compare the experiment’s results with the explanation and explain any differences.