Plants for Food - PowerPoint PPT Presentation

plants for food n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Plants for Food PowerPoint Presentation
Download Presentation
Plants for Food

play fullscreen
1 / 5
Plants for Food
189 Views
Download Presentation
holli
Download Presentation

Plants for Food

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Plants for Food W Richards Worthing High School

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

  3. Using plants for food Fruits and seeds Roots Leaves Stems

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

  5. Another disadvantage of pesticides Small plants Marine insects Fish Kingfisher 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.