- Provide examples of food from plants,
eg carrot, pea, potato, wheat, maize, lettuce, apple, rice, mango, soya bean, grape, radish, coconut, onion. Ask pupils for further examples and to identify which parts of a plant each represents. Explain that each of these foods contains materials produced by the parent plant. Ask them how plants produce this material, and why plants keep large stores of starch in certain parts (roots, stems, seeds), emphasising that it was not produced for humans or animals to eat. Remind pupils about plant respiration.
- Ask pupils to test the samples for the presence of starch, and invite them to suggest why some parts do not give positive results. Explain how the products of photosynthesis may be converted into other substances by the plant.
- Provide microscope slides showing starch grains inside cells,
eg of a potato, and help pupils to interpret what they see.
|
|
- identify which part of a plant is food for humans
- identify, from experimental results, starch stores in some plants
- name some materials produced as a result of photosynthesis
- describe how plants respire
- relate knowledge of the products of photosynthesis to ideas about plants as sources of food for humans and other animals
|
