2. Food chains and food webs

3. 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

4. What I’m Looking For: 1.Construct your own food chain 2.Spot at least two food chains from a food web 3.Point arrows in the right direction in a food chain 4.Construct a food web in a group 5.Be able to answer quiz at the end

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

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

7. 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. KingfisherPondweed Insect larvae Minnow (little fish)

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

9. How is the sun’s energy used?

10. Plankton & Algae

11. Sun allows grass to grow Grass is eaten by Rabbits which are eaten by Owls Food chain: a flow of energy in a habitat

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

13. Grass is eaten by Rabbits which are eaten by Owls Food chain: a flow of energy in a habitat GrassRabbit The arrow means ‘is eaten by’ and always goes towards the consumer Owl

14. Except that Owls also eat Shrews as well as Rabbits Rabbit Owl Shrew Grass

15. Shrews also eat other plant matter as well as Grass Rabbit Owl Shrew Plant matter Grass

16. Shrews also have to watch out for weasels that might eat them Rabbit Owl Shrew Plant matter Weasel Grass

17. And snails and worms eat the plant matter too. Rabbit Owl Shrew Plant matter WormSnail Weasel Grass

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

19. Rabbit Owl Shrew Plant matter WormSnail Weasel Grass HedgehogFox

20. Rabbit Owl Shrew Plant matter WormSnail Weasel Grass HedgehogFox How many food chains are there now? Write down as many as you can in 3 minutes!

21. Shrew Plant matter Worm Snail Weasel Grass Hedgehog Plant matter Shrew Fox Plant matter Plant matter Owl Grass Rabbit OwlShrew Fox GrassRabbitFox Hedgehog Weasel Grass Shrew Fox

22. 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.

23. Some Key Words Producer Consumer –Herbivore –Carnivore –Omnivore

24. PRODUCERS HERBIVORES CARNIVORES OMNIVORES

25. 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!

26. PRODUCER HERBIVORE CARNIVORE Oak TreeFoxMouseSquirrelKingfisherDaffodilSnailPlankton Well Done Everyone!

27. What We Have Done: 1.Constructed food chains 2.Spotted at least two food chains from a food web 3.Point arrows in the right direction in a food chain 4.Constructed a food web in a group 5.Answered quiz at the end

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