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GCSE Biology Food chains webs and pyramids

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Carla Smedberg

GCSE Biology Food chains webs and pyramids

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STARTER ,[object Object],e.g Remember to start with a plant Algae grass blackberries nettles lettuce rabbit cow blackbird butterfly small fish Human fox shark frog hawk You can use the following organisms or any of your own Grass Rabbit Fox
Learning Outcomes ,[object Object],[object Object],[object Object],[object Object]
FOOD CHAINS & WEBS ,[object Object],There are 12 Food chains in this food web. Try to find all 12
Pyramid of numbers
[object Object],Pyramid of biomass Mass of 1 Owl = 5kg Mass of 5 voles = 10kg Mass of 1000 grass plants = 50kg Pyramid of biomass
Pyramid of numbers Pyramid of biomass Mass of 1 sparrowhawk = 5kg Mass of 5 bluetits = 10kg Mass of 1000 caterpillars = 20kg Mass of one tree = 1000kg Pyramid of biomass
[object Object],As energy passes through the food chain some of it makes the biomass Some of it is loss through Respiration, heat, reproduction and faeces Energy flow
Intensive farming V Free range HSW Create an argument either FOR intensive farming or FOR free range farming Use Science, Biology Page 172/3. Meet Susie… … she has a dream!
Learning Outcomes ,[object Object],[object Object],[object Object],[object Object]
Plenary COMPLETE EXAM QUESTIONS

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GCSE Biology Food chains webs and pyramids

  • 1.
  • 2.
  • 3.
  • 5.
  • 6. Pyramid of numbers Pyramid of biomass Mass of 1 sparrowhawk = 5kg Mass of 5 bluetits = 10kg Mass of 1000 caterpillars = 20kg Mass of one tree = 1000kg Pyramid of biomass
  • 7.
  • 8. Intensive farming V Free range HSW Create an argument either FOR intensive farming or FOR free range farming Use Science, Biology Page 172/3. Meet Susie… … she has a dream!
  • 9.