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Chapters

This textbook is organized into 15 chapters covering 241 concepts across the full scope of food science for 9th grade. Chapters are ordered so that every concept's prerequisites are introduced before it is needed — follow them in sequence for the smoothest learning experience.

Chapter Overview

  1. Science in the Kitchen — The scientific method, lab safety, measurement, and the foundational chemistry concepts (atoms, water, pH) that underpin every chapter that follows.
  2. The Molecules of Food — Chemical bonds, water properties, acids and bases, and the four macromolecule families: carbohydrates, proteins, and lipids.
  3. Heat, Cooking Science, and Chemical Reactions — How heat transforms food through conduction, convection, radiation, the Maillard reaction, caramelization, and emulsification.
  4. Food Microbiology — Bacteria, yeast, mold, and viruses in food; the bacterial growth curve; fermentation pathways; and applied cultured foods like yogurt, kombucha, and cheese.
  5. Baking Science — Gluten formation and development, chemical and physical leavening, and the roles of eggs, fats, sugars, and salt in bread and pastry.
  6. Sourdough and Wild Fermentation — Wild yeast capture, the sourdough starter ecosystem, feeding ratios, health indicators, and bulk fermentation. The class sourdough project chapter.
  7. Food Safety and Sanitation — The temperature danger zone, major pathogens, HACCP principles, cross-contamination prevention, and the regulatory agencies that keep food safe.
  8. Nutrition Science — Macronutrients and micronutrients, digestion and absorption, energy balance, Nutrition Facts labels, and sorting fact from fiction in nutrition claims.
  9. Food Preservation — Canning, pickling, freezing, drying, smoking, and modern packaging technologies — and the science that makes each method work.
  10. Sensory Science — The five basic tastes, olfaction, flavor construction, texture and mouthfeel, color perception, and how to design and run a sensory evaluation panel.
  11. Food Technology and Industrial Processing — Pasteurization, homogenization, food additives, packaging, food traceability, and the science behind the industrial food system.
  12. Agricultural Systems and Sustainability — Soil health, crop rotation, organic vs. conventional farming, food waste, carbon and water footprints, and biodiversity in agriculture.
  13. The Farm-to-Table Movement and Local Food Systems — Post-harvest physiology, supply chain barriers, food deserts, CSAs, urban farming, gleaning, the NOVA classification, and UPF health impacts.
  14. Global Food Cultures and Food Futures — How geography, climate, religion, and history shape food traditions around the world, and how climate change is reshaping them.
  15. Food Engineering, Hydroponics, and Innovation — Lab-grown meat, plant-based proteins, precision fermentation, 3D food printing, and the semester-long hydroponic class project.

How to Use This Textbook

Read chapters in the order listed — each chapter's concepts are built on foundations established in earlier chapters. Use the Learning Graph to visualize how concepts connect across chapters. Every chapter includes a list of concepts covered and links to prerequisite chapters so you can review if needed.

Each chapter pairs explanatory content with two types of labs: virtual MicroSim labs (interactive simulations you run in a browser) and kitchen labs (hands-on experiments in the school kitchen or at home). Both types of labs appear throughout the year, not just in dedicated lab sessions.

Note: Each chapter index includes the full list of concepts covered. Review earlier chapters if you encounter a concept that feels unfamiliar — it was introduced as a prerequisite.