Study Integrated Science notes on Plant Nutrition / Photosynthesis for Secondary. Useful for revision, homework, and exam preparation in Zimbabwe.
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This is the Integrated Science notes. It is a free notes for revision.
PAMUZINDA EDUCATIONAL CONSULTANCY INTERGRATED SCIENCE NOTES FOR SUCCESS SCIENCE IN AGRICULTURE 1.PLANT NUTRITION - Green plants are the only living organisms able to manufacture their own food. - They are called food producers of the world. - Animals rely on green plants to make food that produces energy. - Plants make food in the form of carbohydrates molecules i.e. sugar and starches. PHOTOSYNTHESIS Photo-means light Synthesis- means make/build up. - It's whereby green plants manufacturer green their own food using carbon dioxide, water and light as a source of energy. - Green plants are the producers of food and oxygen. - Plants convert light energy into potential chemical energy. - Photosynthesis can be defined as the process by which green plants use light energy to combine carbon dioxide and water into carbohydrates, releasing oxygen as a by-product. - This can be summarized by an equation as follows: Experiment: Testing a leaf for starch. Method; 1. Place the leaves in boiling water to stop chemical reactions. 2. Boil the leaf in alcohol in water bath to remove chlorophyll. 3. Place the brittle leaves in warm water for few seconds to soften the leaves. 4. Spread the leaves on a white tile and flood the leaves with iodine solution. 5. Record the colour change of iodine. 1