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Food chains and food webs _PPT_ - Xplora

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Food chains and food webs _PPT_ - Xplora Powered By Docstoc
					The material in this slide show is provided free for educational use only.
 All other forms of storage or reproduction are subject to copyright -
             please contact the National Marine Aquarium

                    www.national-aquarium.co.uk



                              Science
                               Training &
                                Education
                                  Partnership

 The slide show was designed and produced for the NMA by STEP, the
              Science Training & Education Partnership
                    www.step-up-to-science.com
Food chains and food webs -
      ‘who eats whom’
 Plants and animals living
in a habitat can be linked
         together
Food chains show how
 food passes from one
living thing to another
 All food chains start
      with a Plant

 Plants can make their
own food, using sunlight
                                             FOX




                        RABBIT


                                       An animal that eats
                                          other animals


    GRASS
                      An animal that
                       eats plants


                                          The arrows
                                           show the
A plant - makes its                       food chain
     own food
Food chains work in the
 same way in the sea ...

 … but the plants and
  animals look a bit
      different!
                                                      FISH


                          COPEPOD

                 Out in the ocean, there is
                                                An animal that eats
     ALGAE           no grass or trees             other animals


                The plants are tiny ALGAE
                            tiny animal
                - you needAa microscope to
                         that eats plants
                         see them


                                                This is a food
Microscopic plants -                          chain in the ocean
make their own food
  This food chain
wouldn’t stop here ...
In most habitats, there
are several food chains

   These are linked
  together to form a
      Food Web
Food webs can be quite
     complicated

  Here is one from the
ocean around Antarctica
                                                    Seals eat squid
                                              Squid eat fish
                                                        and fish
                                                 and krill
                                       Fish eat krill and
                                           copepods
                          A simple food chain -
                           whale eats krill eats
                                  algae
                         Copepods also eat algae,
                          and are eaten by krill
This food web contains 7 types of living things, and 9 food chains
The shortest food chain
 in the Antarctic food
   web has two links
The longest food chain
in the Antarctic food
  web has five links
You have seen that -
    A food chain links
    plants and animals in
    a habitat
    All food chains start
    with a plant
You have seen that -
    Food chains on land
    and in the ocean are
    similar
    Food chains can be
    linked to form food
    webs
                                        NOTES for USERS

 The material in this slide show is designed to support the teaching of science at Key Stage 1

   A full description of the slide show, and linked activities for students, can be found on the
                            National Marine Aquarium (NMA) web-site:

                                  www.national-aquarium.co.uk
Teachers are free to amend the slide show in whatever way they feel fit, or to use slides in other
     contexts. However, please note that neither the NMA nor the designers will accept
     responsibility for modifications, and original material remains copyright of the NMA

               Individual images used in the slides are copyright of NMA or STEP,
                            except where acknowledged separately

 The slides have been set up to display as A4 landscape format. If they are incorporated into
 other slide sequences with different display settings, change in aspect ratio and text location
                                           will occur

The slide sequence contains the minimum of effects and transitions. However, there are some
  automated animations, and teachers will wish to make sure that they are familiar with the
                                sequence before use in class

       Use the PowerPoint notes viewer to obtain additional information for some slides




                                                                                         Science
                                                                                          Training &
                                                                                           Education
                                                                                             Partnership

				
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