Physical Sciences & Cosmology
Words for how the universe actually works: particles, forces, and the vocabulary of everything from atoms to galaxies.
Astrophysics & Cosmology
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Classical Mechanics & Motion
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Quantum Mechanics
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Inorganic Chemistry
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Organic Chemistry & Polymers
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Thermodynamics & Entropy
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Earth Science & Geology
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Meteorology & Atmospheric Science
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Oceanography
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Optics & Light Behavior
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Acoustics & Sound Waves
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Electromagnetism
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Laboratory Apparatus
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History of Scientific Revolutions
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Our English vocabulary app: FSRS spaced repetition, 5,000+ curated words across 119 topic groups, CEFR A1 to C2. Explore your mastery with the beautiful Vocabulary World feature.