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1. 23/09/15
Plants for FoodPlants for Food

2. 23/09/15
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.

3. 23/09/15
Using plants for foodUsing plants for food
Fruits and
seeds
Roots
Leaves
Stems

4. 23/09/15
Advantages
Helping plants to growHelping 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

5. 23/09/15
Another disadvantage of pesticidesAnother 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 plants KingfisherMarine insects Fish

6. 23/09/15
Another disadvantage of pesticidesAnother 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 plants KingfisherMarine insects Fish