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Food chains and food webs

Food chains and food webs. We Are Learning To…. …use words correctly to describe feeding relationships between animals and plants. …show how energy flows through food chains …interlink food chains to form food webs. What I’m Looking For:. Construct your own food chain

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Food chains and food webs

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  1. Food chains and food webs

  2. We Are Learning To… …use words correctly to describe feeding relationships between animals and plants. …show how energy flows through food chains …interlink food chains to form food webs

  3. What I’m Looking For: • Construct your own food chain • Spot at least two food chains from a food web • Point arrows in the right direction in a food chain • Construct a food web in a group • Be able to answer quiz at the end

  4. Trout Kingfisher Pondweed Minnow (little fish) Heron Insect larvae

  5. Insect larvae Minnow (little fish) Pondweed Kingfisher http://www.riverlee.org.uk/science/scie-02/scie-02a.htm

  6. Your turn • In pairs write down two food chains. • Perhaps one of the organisms in it could be you! • (Hopefully not being eaten by a wolf ) • Draw in arrows pointing from the thing being eaten to the thing eating it. Insect larvae Minnow (little fish) Pondweed Kingfisher

  7. Energy Flow Which way does the energy flow? • Which way do the sun’s rays go? What is it used for?

  8. How is the sun’s energy used?

  9. Plankton & Algae

  10. Food chain: a flow of energy in a habitat Sunallows grass to grow Grassis eaten by Rabbitswhich are eaten by Owls

  11. Food chain: a flow of energy in a habitat Grass is eaten by Rabbits which are eaten by Owls

  12. Grass Rabbit Owl Food chain: a flow of energy in a habitat Grassis eaten by Rabbitswhich are eaten by Owls The arrow means ‘is eaten by’ and always goes towards the consumer

  13. Except thatOwls also eatShrewsas well as Rabbits Shrew Owl Grass Rabbit

  14. Shrewsalso eat other plant matter as well as Grass Plant matter Shrew Owl Rabbit Grass

  15. Shrewsalso have to watch out for weasels that might eat them Weasel Plant matter Shrew Owl Rabbit Grass

  16. And snails and worms eat the plant matter too. Weasel Shrew Plant matter Owl Rabbit Grass Worm Snail

  17. Food Chain to Food Web Let’s complete ours with hedgehogs (that eat snails & worms) and foxes (that eat pretty much anything that moves!)

  18. Weasel Shrew Plant matter Owl Rabbit Grass Worm Snail Hedgehog Fox

  19. How many food chains are there now? Weasel Shrew Plant matter Owl Rabbit Grass Worm Snail Hedgehog Fox Write down as many as you can in 3 minutes!

  20. Plant matter Shrew Weasel Fox Grass Shrew Weasel Fox Plant matter Shrew Owl Shrew Owl Grass Plant matter Hedgehog Fox Worm Plant matter Hedgehog Fox Snail Rabbit Fox Grass Grass Rabbit Fox

  21. Food Chain to Food Web The original food chain has expanded into a food web with 8 interlinked chains as more organisms have been added Food webs are normal in natural habitats as there is nearly always more than one organism that eats something else.

  22. Some Key Words • Producer • Consumer • Herbivore • Carnivore • Omnivore

  23. CARNIVORES OMNIVORES HERBIVORES PRODUCERS

  24. Your turn • In groups of four use the pictures in the envelopes to make your own food webs. • Start off with individual food chains • Then try to link them together to make a food web. • Draw in some arrows – the right way round!

  25. Oak Tree Fox Mouse Squirrel Kingfisher Daffodil Snail Plankton Well Done Everyone! CARNIVORE HERBIVORE PRODUCER

  26. What We Have Done: • Constructed food chains • Spotted at least two food chains from a food web • Point arrows in the right direction in a food chain • Constructed a food web in a group • Answered quiz at the end

  27. PRODUCERS HERBIVORES CARNIVORES Caterpillar Mouse Woodlouse Oak Grass Small plants Dead material Owl Snake Woodland Beetles Spiders Fish Insect larvae Snail Plankton Pondweed Dead material Pond Greenfly Woodlouse Small bird Hawk Weasel Hawthorn Dead material Hedgerow

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