19.1
Making food from light
What plants need to make food, the word summary, chloroplasts and chlorophyll, what plants do with glucose, and minerals from the soil.
19.2
Leaves
How a leaf is adapted: inside a leaf, palisade cells, air spaces, stomata and guard cells, veins, and transpiration.
19.3
Factors that affect photosynthesis
Measuring photosynthesis with pondweed, light, carbon dioxide and temperature, a fair test, limiting factors and greenhouses.
19.4
Life depends on photosynthesis
Testing a leaf for starch, what a leaf needs to make it, food chains, plants respiring day and night, and the oxygen and carbon dioxide in the air.
Daily 5
Five quick diagram questions a day from this unit. The ones you get wrong come back sooner. Progress saves in this browser.
What this unit covers
Mapped to the KS3 national curriculum (Biology: photosynthesis).
| Programme of study | Lesson |
|---|---|
| the reactants in, and products of, photosynthesis, and a word summary for photosynthesis | 19.1, 19.3 |
| the dependence of almost all life on Earth on the ability of photosynthetic organisms, such as plants and algae, to use sunlight in photosynthesis to build organic molecules that are an essential energy store and to maintain levels of oxygen and carbon dioxide in the atmosphere | 19.1, 19.4 |
| the adaptations of leaves for photosynthesis | 19.2 |
| plants making carbohydrates in their leaves by photosynthesis and gaining mineral nutrients and water from the soil via their roots | 19.1 (with 4.4) |
| the role of leaf stomata in gas exchange in plants | 19.2 (with 7.4) |
Next at GCSE