GCSE Biology Food chains webs and pyramids

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GCSE Biology Food chains webs and pyramids

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GCSE Biology Food chains webs and pyramids

  1. 1. STARTER <ul><li>Create 3 food chains </li></ul>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
  2. 2. Learning Outcomes <ul><li>Food chain and webs </li></ul><ul><li>ALL Construct food chains, food webs and food pyramids </li></ul><ul><li>MOST Interpret energy diagrams </li></ul><ul><li>SOME Evaluate the pro’s and con’s of intensive farming and free range farming </li></ul>
  3. 3. FOOD CHAINS & WEBS <ul><li>Watch the animation on food chains </li></ul>There are 12 Food chains in this food web. Try to find all 12
  4. 4. Pyramid of numbers
  5. 5. <ul><li>Pyramid of numbers </li></ul>Pyramid of biomass Mass of 1 Owl = 5kg Mass of 5 voles = 10kg Mass of 1000 grass plants = 50kg Pyramid of biomass
  6. 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. 7. <ul><li>All energy comes from the sun </li></ul>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
  8. 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. 9. Learning Outcomes <ul><li>Food chain and webs </li></ul><ul><li>ALL Construct food chains, food webs and food pyramids </li></ul><ul><li>MOST Interpret energy diagrams </li></ul><ul><li>SOME Evaluate the pro’s and con’s of intensive farming and free range farming </li></ul>
  10. 10. Plenary COMPLETE EXAM QUESTIONS

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