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Welcome

By

Revathy N

Physical Science

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THE CARBON CYCLE

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What Is Carbon

An element

The basis o! li!e o! earth

"o#n$ in roc%s& oceans& atmos'here

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Carbon Cycle

The same carbon atoms are #se$

re'eate$ly on earth( They cycle bet)een

the earth an$ the atmos'here(

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Plants *se Carbon +io,i$e

Plants '#ll carbon $io,i$e !rom the

atmos'here an$ #se it to ma%e !oo$ -.

'hotosynthesis(

The carbon becomes 'art o! the 'lant

/store$ !oo$0(

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Animals Eat Plants

When or1anisms eat 'lants& they ta%e in

the carbon an$ some o! it becomes 'art

o! their o)n bo$ies(

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Plants an$ Animal +ie

When 'lants an$ animals $ie& most o!

their bo$ies are $ecom'ose$ an$

carbon atoms are ret#rne$ to the

atmos'here(

Some are not $ecom'ose$ !#lly an$ en$

#' in $e'osits #n$er1ro#n$ /oil& coal&

etc(0(

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Carbon Slo)ly Ret#rns to Atmos'here

Carbon in roc%s an$ #n$er1ro#n$

$e'osits is release$ very slo)ly into theatmos'here(

This 'rocess ta%es many years(

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Cycle - Re'eats Over an$

Over an$ Over an$ Over 2

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Carbon Cycle Diagram

Carbon in Atmosphere

Plants usecarbon tomake food

Animals eatplants andtake in

carbon

Plants andanimals die

Decomposersbreak down dead

things,releasingcarbon to

atmosphere andsoil

Bodies not

decomposed after many

years, becomepart of oil orcoal deposits

Fossil fuelsare burned;carbon isreturned to

atmosphere

Carbon slowlyreleased from

these substancesreturns toatmosphere

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Carbon in Oceans

A$$itional carbon is store$ in the ocean(

3any animals '#ll carbon !rom )ater to #se in

shells& etc(

Animals $ie an$ carbon s#bstances are

$e'osite$ at the bottom o! the ocean(

Oceans contain earth4s lar1est store o! carbon(

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The Carbon Cycle

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H#man Im'act

"ossil !#els release carbon stores very

slo)ly

B#rnin1 anythin1 releases more carbon

into atmos'here . es'ecially !ossil !#els

Increase$ carbon $io,i$e in atmos'here

increases 1lobal )armin1

"e)er 'lants mean less CO5remove$

!rom atmos'here

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What We Nee$ to +o

B#rn less& es'ecially !ossil !#els

Promote 'lant li!e& es'ecially trees

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Than% yo#22