9 d plants for food (whs)
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08/04/23
Plants for FoodPlants for Food
08/04/23
Food chainsFood 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.
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Using plants for foodUsing plants for food
Fruits and seeds
Roots
Leaves
Stems
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Advantages
Helping plants to growHelping plants to growFarmers 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
08/04/23Another disadvantage of Another disadvantage of pesticidespesticides
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 plants KingfisherMarine insects
Fish