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Entry Activity… An organism that only eats other consumers. An organism that only eats producers. An organism that makes its own food. An organism that cannot make its own food. An organism that eats the ? ? ? ? ? ? ? ? carnivor e herbivor e producer consumer omnivore

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Page 1: Entry Activity… An organism that only eats other consumers. An organism that only eats producers. An organism that makes its own food. An organism that

Entry Activity…

An organism that only eats other consumers.

An organism that only eats producers.

An organism that makes its own food.

An organism that cannot make its own food.

An organism that eats the both consumers and producers.

??

??

??

??

carnivore

herbivore

producer

consumer

omnivore

Page 2: Entry Activity… An organism that only eats other consumers. An organism that only eats producers. An organism that makes its own food. An organism that

FOOD CHAINS

Year 7_0

Page 3: Entry Activity… An organism that only eats other consumers. An organism that only eats producers. An organism that makes its own food. An organism that

Food Chains

• Food chains show us what is eaten by what.

• Look at the following food chain…

Page 4: Entry Activity… An organism that only eats other consumers. An organism that only eats producers. An organism that makes its own food. An organism that

Food chain

• The shows the direction of energy flow in the chain. We can imagine that the arrow means ‘eaten by’, so energy is transferred in the direction of the arrow.

• Grass is eaten by the Sheep, which is eaten by a fox.

Page 5: Entry Activity… An organism that only eats other consumers. An organism that only eats producers. An organism that makes its own food. An organism that

ProducerThese organisms make their own food

Food Chains

We can use a food chain to group organisms in another way:

• seaweed limpet crayfish humans

Primary consumerThis is an organism that eats producers.

Secondary consumerThis is an organism that eatsprimary consumers.

Tertiary consumerThis is an organism that eats secondary consumers.

http://images.google.co.uk/imgres?imgurl=http://www.lbap.org.uk/images/species/crayfish.JPG&imgrefurl=http://www.lbap.org.uk/bap/species/crayfish.htm&h=361&w=570&sz=116&hl=en&start=9&um=1&tbnid=HsZML5MyQ6aBfM:&tbnh=85&tbnw=134&prev=/images%3Fq%3Dcrayfish%26svnum%3D10%26um%3D1%26hl%3Den%26rls%3DHPEB,HPEB:2006-47,HPEB:en
http://images.google.co.uk/imgres?imgurl=http://library.thinkquest.org/J001418/media/limpet8.JPG&imgrefurl=http://library.thinkquest.org/J001418/limpet.html&h=334&w=287&sz=11&hl=en&start=11&um=1&tbnid=JS_BxyO9vjl6bM:&tbnh=119&tbnw=102&prev=/images%3Fq%3Dlimpet%26svnum%3D10%26um%3D1%26hl%3Den%26rls%3DHPEB,HPEB:2006-47,HPEB:en
http://images.google.co.uk/imgres?imgurl=http://www.motherlandnigeria.com/n_images/people_cartoon.gif&imgrefurl=http://www.motherlandnigeria.com/club.html&h=164&w=245&sz=18&hl=en&start=12&um=1&tbnid=lrsQGmZ1skhRnM:&tbnh=74&tbnw=110&prev=/images%3Fq%3Dpeople%2Bcartoon%26svnum%3D10%26um%3D1%26hl%3Den%26rls%3DHPEB,HPEB:2006-47,HPEB:en
Page 6: Entry Activity… An organism that only eats other consumers. An organism that only eats producers. An organism that makes its own food. An organism that

Food Chains Activity…

Draw four different food chains using the following

as guidelines:

1. One of your food chains must occur in the forest.

2. One of you food chains must occur in the ocean.

3. One of your food chains must end with you.

Page 7: Entry Activity… An organism that only eats other consumers. An organism that only eats producers. An organism that makes its own food. An organism that

Food webs…

Most animals usually eat many different things. So rather than have lots of different food chains for the same organisms we can put them together to make a food web.

Page 8: Entry Activity… An organism that only eats other consumers. An organism that only eats producers. An organism that makes its own food. An organism that

Watch how the food chains are put together to make a food web.Watch how the food chains are put together to make a food web.

blue tit

chiffchaff

plants

aphidmoth larva

vole

stoat

owl

spider

ladybird

Page 9: Entry Activity… An organism that only eats other consumers. An organism that only eats producers. An organism that makes its own food. An organism that

Food webs

• For example:• The food web on the next slide has put together

all of the food chains below:• plants aphid ladybird blue tit owl• plants moth larva blue tit owl• plants moth larva spider chiffchaff owl• plants vole stoat• plants vole owl

Page 10: Entry Activity… An organism that only eats other consumers. An organism that only eats producers. An organism that makes its own food. An organism that

Food Web Activity...

Make your own FOOD WEB by choosing some of the animals that you can find in your worksheet.

Apparatus:- A4 sheet- Worksheet- Glue stick- scissors


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