Photosynthesis: Every Step, Explained (GCSE Biology)

Photosynthesis for GCSE Biology: every step, explained simply as a 3-second quiz (keep score). The word and symbol equations, why it is endothermic, chloroplasts and chlorophyll, where a tree's mass really comes from, stomata and guard cells, the palisade layer and leaf adaptations, limiting factors (light intensity, carbon dioxide, temperature), the inverse square law, the pondweed required practical, the five uses of glucose, and greenhouse farming. Also covered: the three limiting factor graphs, the starch test with iodine, Jan van Helmont's willow tree experiment, and why farmers balance extra yield against cost (higher tier). For AQA, Edexcel, OCR and WJEC/Eduqas GCSE Biology and Combined Science (Bioenergetics). 📄 FREE WORKSHEET (PDF, 20 questions): https://drive.google.com/file/d/1nz2e... ✅ ANSWERS (PDF): https://drive.google.com/file/d/1qoNb... Chapters 0:00 Food from light 0:32 The equation 1:08 Endothermic 1:37 Chloroplasts 2:11 Where the mass comes from 2:53 Stomata 3:26 Palisade layer 4:02 Limiting factors 4:33 Light intensity 5:01 Carbon dioxide 5:28 Temperature 5:56 Inverse square law 6:22 The practical 7:03 Uses of glucose 7:46 Greenhouses 8:21 Your score EXAM TIP: learn the limiting factor graphs. Light and carbon dioxide level off; temperature falls because enzymes denature. Write your score in the comments! Every ___, Explained: one big topic, every piece of it, explained simply. #gcsebiology #photosynthesis #gcsescience