| 1–5 | How Glow Became GloomRadium watch-dial painters and safer glowing dials: alpha decay, ion formation, and electron energy levelsNuclear chemistry · Periodic patterns · Bonding and formulas · Electromagnetic radiation · Engineering design (HS-PS1-8, HS-PS1-1, HS-PS1-2, HS-PS4-4, HS-ETS1-3) | 2 MC, 3 CR | Practice cluster |
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| 6–10 | Chemistry of BeveragesSoda going flat and acidic drinks in cans: gas solubility and temperature, moles to molecules, pH and indicatorsStoichiometry and conservation · Thermochemistry · Solutions · Acids and bases (HS-PS1-7, HS-PS1-5, HS-PS1-10, HS-PS1-11) | 3 MC, 2 CR | Practice cluster |
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| 11–14 | Equilibria in the BloodOxygen and carbon dioxide carried in blood: collision theory, catalysts and reaction rate, Le Châtelier's principleReaction rates · Polarity and molecular structure · Equilibrium (HS-PS1-5, HS-PS3-5, HS-PS1-6) | 1 MC, 3 CR | Practice cluster |
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| 15–18 | The Accidental Development of Breathable, Waterproof FabricHow PTFE became waterproof, breathable jackets: balancing equations, intermolecular forces, and polarityStoichiometry and conservation · Intermolecular forces · Materials and structure · Polarity and molecular structure (HS-PS1-7, HS-PS1-3, HS-PS2-6) | 3 MC, 1 CR | Practice cluster |
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| 19–22 | Urban Heat IslandsGrass, artificial turf, brick, and paint in hot cities: specific heat, heat calculations, and absorbed wavelengthsThermochemistry · Electromagnetic radiation · Engineering design (HS-PS3-1, HS-PS4-4, HS-ETS1-2) | 3 MC, 1 CR | Practice cluster |
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| 23–27 | Balloon ArchesSelf-inflating mylar balloons for a winter dance: gas laws, stoichiometry, and endothermic vs exothermic reactionsGases · Stoichiometry and conservation · Thermochemistry · Engineering design (HS-PS1-9, HS-PS1-7, HS-PS3-1, HS-ETS1-3) | 3 MC, 2 CR | Practice cluster |
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| 28–32 | Clock ReactionTiming a starch–iodine color change: temperature and catalysts in reaction rate, plus oxidation numbers and molarityReaction rates · Acids and bases · Oxidation and reduction · Solutions (HS-PS1-5, HS-PS1-11, HS-PS1-12, HS-PS1-10) | 4 MC, 1 CR | Practice cluster |
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| 33–37 | Chip Bag: PFAS vs PLA PlasticsChoosing a chip-bag plastic: polymer formation, bond strength, periodic trends, and PFAS limits in drinking waterStoichiometry and conservation · Polarity and molecular structure · Periodic patterns · Materials and structure · Solutions (HS-PS1-7, HS-PS2-6, HS-PS1-1, HS-PS1-10) | 2 MC, 3 CR | Practice cluster |
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| 38–41 | Photosynthetic PathwaysTracing oxygen-18 in algae and adjusting soil for raspberries: the photosynthesis equation, nuclear decay, and pHPhotosynthesis · Nuclear chemistry · Acids and bases · Engineering design (HS-LS1-5, HS-PS1-8, HS-PS1-11, HS-ETS1-3) | 2 MC, 2 CR | Practice cluster |
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| 46–50 | Indoor Air PollutionVOCs, radon, and carbon monoxide at home: nuclear decay equations, intermolecular forces, and polarity in solutionsEngineering design · Nuclear chemistry · Intermolecular forces · Solutions · Polarity and molecular structure (HS-ETS1-2, HS-PS1-8, HS-PS1-3, HS-PS1-10, HS-PS3-5) | 3 MC, 2 CR | Practice cluster |
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