stages in a food web

• food chain and webs start with green plants or algae
• green plants get their energy from sunlight
• light energy is captured into a food chain or web by photosynthesis.
• photosynthesis captures only a little of the suns radiation
• photosynthesis requires the presence of chlorophyll
• in green plants, chlorophyll is found in chloroplasts
• herbivores are animals that eat only plants
• carnivores are animals that eat other animals
• omnivores are animals that eat both plants and animals
• predators are carnivores that capture and kill their food
• a top carnivore is at the top of a food web
• the producers in this food web is the green plants

  
• examples of a primary consumer in this food web: caterpillar, rabbits, greenfly

  
• a woodlouse is an example of a decomposer
• decomposers are useful because they release mineral salts for plants to reuse
• Label the layer of secondary consumers: B

  
• Label the layer of tertiary consumers: A

  
• Label the layer of primary consumers: C

  
• Label the layers of producers: D

  
• The top predator in a food web is likely to be a tertiary consumer
• energy enters a food web through the producers
• energy is lost from a food web through all levels
• In a food web, the fraction of the energy passed on from one layer to the one above is about one tenth
• Letter: B

  
• Letter: B

  
• Letter: D

  
• Letter: D

  
• Letter: D

  
• Letter the first stage consumers: C

  
• Label the second stage consumers: B

  
• Label the producers: D

  
• Label the third stage consumers: A