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Food Chains and Food Webs 03

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					                Food Chains and Food Webs
                       What is a Food Chain?
All living things need food to give them the energy to grow and move. A
food chain shows how each living thing gets its food. It shows who is
eating who. The arrow means "is eaten by" .




  Grass ---->    Grasshopper -     Toad ---->      Snake ---->      Hawk
                      --->

 Grass is eaten by Grasshopper is eaten by Toad is eaten by Snake is eaten by
                                    Hawk


     A food chain always starts with a green plant ...
                        (All plants are PRODUCERS.)

                  ...... which is eaten by an animal.
            ( All the animals in a food chain are CONSUMERS)

                A food chain ends with a predator.
                (The predator is at the top of the food chain)

        The Sun is very important for all living things, without the
        sun the plants would not grow, without plants there would be
 no animals


                What is the difference between
                 a food web and a food chain?
A food web consists of many food chains.
A food chain only follows just one path as animals find food.
eg: A hawk eats a snake, which has eaten a frog, which has eaten a
grasshopper, which has eaten grass.

A food web shows the many different paths plants and animals are
connected.
eg: A hawk might also eat a mouse, a squirrel, a frog or some other animal.
The snake may eat a beetle, a caterpillar, or some other animal. And so on
for all the other animals in the food chain.

A food web is several food chains connected together.

               Web site to create your own food web:
             http://www.vtaide.com/png/foodweb.htm



     C




            FOOD CHAIN                     FOOD WEB
         (just one path of energy)   (everything is connected!)

				
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posted:11/30/2011
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