Photosynthesis Explained: The Whole Process Step by Step

Consider the largest tree you can imagine. Virtually all of its mass is not derived from soil — but was created from thin air. This isn't some sort of illusion; this is photosynthesis, which is much more bizarre than "plants turn sunlight into food." In this video, photosynthesis is described in simple terms, in chronological order: the processes that occur within the chloroplast, the reason why the leaves appear green, light-dependent reactions, Calvin cycle, and the catch that many people get wrong — how the oxygen you breathe is produced. The video is targeted at high school biology and AP Biology students, featuring visual chalkboard explanations along with the must-know details for your class, test, final, and homework. You'll learn where photosynthesis takes place, what substances are absorbed during it, what products are formed, and why Calvin cycle requires light reactions in order to create the sugar. ⏱️ CHAPTERS 0:00 Hook – a tree that is made of air in disguise 0:51 Myth debunked – plants don't really "eat" sunlight 1:53 Chloroplasts and the reason why the leaves appear green 2:32 Substances that enter chloroplasts and the products of photosynthesis 3:11 Process stage 1 – the light 3:51 The twist: where the oxygen REALLY comes from 4:42 The two energy carriers (ATP & NADPH) 5:21 Stage 2 — The Calvin cycle 6:12 The "dark reactions" mistake 6:47 Photosynthesis vs cellular respiration 7:58 Recap + exam essentials 8:41 Why a leaf is amazing 📚 SOURCES & FURTHER READING Khan Academy — Photosynthesis (khanacademy.org) OpenStax Biology, free textbook (openstax.org) Encyclopædia Britannica — Photosynthesis (britannica.com) CrashCourse Biology — Photosynthesis (youtube.com) The Nobel Prize — Melvin Calvin, 1961, for mapping the Calvin cycle (nobelprize.org) If this finally made photosynthesis click, leave a like, drop a comment with the topic you want explained next, and subscribe for more science made simple. #Photosynthesis #Biology #APBiology #HighSchoolBiology #ScienceExplained #Chloroplast #Chlorophyll #CalvinCycle #LightReactions #Glucose #Oxygen #Plants #BiologyHelp #ExamPrep #StudyTips #HomeworkHelp #CellBiology #PhotosynthesisExplained #LearnBiology #ScienceForStudents #ScienceSimplified #Bio #APBioReview