18/03/2016 Plants for Food. 18/03/2016 Food chains A food chain shows where the energy goes in a food chain (in other words, “what gets eaten by what”):

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Presentation transcript:

18/03/2016 Plants for Food

18/03/2016 Food chains A food chain shows where the energy goes in a food chain (in other words, “what gets eaten by what”): Cabbage Rabbit Stoat Fox The arrows indicate where the energy is going Plants convert the sun’s energy into food Plants are called “producers” – they “produce” the energy for the rest of the food chain through photosynthesis.

18/03/2016 Using plants for food Fruits and seeds Roots Leaves Stems

18/03/2016 Advantages Helping plants to grow Farmers can use a number of chemicals to help plants to grow: 1) Fertilisers 2) Herbicides 3) Pesticides Disadvantages Disrupt food chains Provide nutrients NPK Too much of it can kill pond life Kill weeds Kill pests Disrupt food chains

18/03/2016 Another disadvantage of pesticides Insecticides can wash into a stream or lake where they are taken up by microscopic water plants. Consider the food chain: Although the level of insecticides in the plants is small, it will build up through the food chain due to the number of organisms in each stage. Small plantsKingfisherMarine insectsFish