1. 27/11/2018
Plants for Food
W Richards
Worthing High School

2. Food chains
27/11/2018
A food chain shows where the energy goes in a food chain (in other words, “what gets eaten by what”):
Rabbit
Cabbage
Fox
Stoat
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. Using plants for food
27/11/2018
Fruits and seeds
Roots
Leaves
Stems

4. Helping plants to grow
27/11/2018
Farmers can use a number of chemicals to help plants to grow:
Advantages
Disadvantages
Provide nutrients
NPK
Too much of it can kill pond life
1) Fertilisers
Kill weeds
Disrupt food chains
2) Herbicides
Kill pests
3) Pesticides
Disrupt food chains

5. Another disadvantage of pesticides
27/11/2018
Insecticides can wash into a stream or lake where they are taken up by microscopic water plants. Consider the food chain:
Small plants
Kingfisher
Marine insects
Fish
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.