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introduction background knowledgePlant# are able to con$ert light energy into chemical energy through the proce## o% photo#ynthe#i#&Campbell & Reese, global Edition '( )hi# proce## i# dependent on both a*biotic and biotic %actor#(Since plant# are autotroph#+ the mo#t $ital are a*biotic %actor# #uch a# light+ temperature+ wind+water+ and atmo#pheric ga#e# &Campbell & Reese, global Edition '( Photo#ynthe#i# will work i% there

i# red blue ore yellow in the area( ,nder each colour i# the #ame amound o% energy prodeu#t&http://hyperphysics.phy-astr.gsu.edu/hbase/biology/ligabs.html '( )he plant o% intere#t in thi# #tudyi# -emna minor+ Al#o called .uckweed( duckweed i# a #mall plant that li$e# in %re#h wateren$ironment#+ and li$e in group# %rom /*3 the lea$e# are approximately 0*1 mm in #i e&ecy.wa.gov '( .uckweed wa# cho#en %or thi# experiment becau#e it can be manipulated ea#ily withina laboratory #ettingthe goal o% the experimentthe goal i# to %ind out on which colour o% light the duckweed will grow the %a#te#t(

hypothesist i# #aid that altering the amount o% light recei$ed by duckweed will alter it# photo#ynthetic rate( t

i# predicted that a lower light inten#ity will lower the rate o% growth in duckweed( )hu# i% the lightinten#ity i# the duckweed will barley ore not grow(

Procedurethere are di%%erent light #ource# each a di%%erent colour under each one ha# to be a bowl whit lea%#(

ow get a bowl o% water and add li4uid nutrient# to the bowl #o the duckweed can grow( ow count2" lemna minor and add them to the bowl+ do thi# %or etch colour( Place the bowl# under the light#and count twice a weak how many lea%# grew %or 5 week# long(

Resultshere you6ll #ee the chart# o% the di%%erent colour# o% the duckweed experiment(7n the x axi# are the day# the data where capturedthe 8 axi# are the $alue#each line repre#ent# it# own $alue #o blue i# temperature in degree# 9el#iu#+ yellow i# light in luxeand red humanity(

A beelding !: "n the # a#is are the days the data where captured the $ a#is are the values each linerepresents its own value so blue is temperature in degrees Celsius, yellow is light in lu#e and red humanity.

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beelding ': "n the # a#is are the days the data where captured the $ a#is are the values each line represents its ownue so blue is temperature in degrees Celsius, yellow is light in lu#e and red humanity.

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beelding (: "n the # a#is are the days the data where captured the $ a#is are the values each line represents its ownue so blue is temperature in degrees Celsius, yellow is light in lu#e and red humanity.

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A beelding ): "n the # a#is are the days the data where captured the $ a#is are the values each line representsits own value so blue is temperature in degrees Celsius, yellow is light in lu#e and red humanity.

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Amount o% lea%# in counted e$ery week( 8ou6ll #ee a graph %or e$ery #ingle colour and one alltogether(

A beelding *: the photosynthesis under di erent wavelengths.

+e st !: http://hyperphysics.phy-astr.gsu.edu/hbase/biology/ligabs.html

A beelding : in this graph the growth rate o the lea s are compared each line e uals adi erent group.

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http://hyperphysics.phy-astr.gsu.edu/hbase/biology/ligabs.htmlhttp://hyperphysics.phy-astr.gsu.edu/hbase/biology/ligabs.htmlhttp://hyperphysics.phy-astr.gsu.edu/hbase/biology/ligabs.html

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Pictures from the dark group.

A beelding *: wee ! A beelding : wee !

A beelding !0: wee % A beelding !!: wee

A beelding !%: wee A beelding ! : wee '

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Discussion think the re#ult# that we got are pretty reliable( Becau#e the condition that the plant# where #et in

we almo#t con#tant thu# they barely to nothing change the reliability o% the outcome( )he only thingthat could change the outcome greatly wa# that we had to add %ertili er to the experiment( And wedon:t know i% e$ery group did that correctly #o that would change the reliability o% the experiment(

But think looking at the data that we got that that didn6t happen(From what we know %rom the literature the experiment went a## predicted( n a dark en$ironmentthe plant# will die becau#e they cant make energy throe photo#ynthe#i# becau#e there i# no light(Fore the other colour# %rom the data that we got %orm the other group# we can #ee that they arerelati$ely clo#e thu# that con%irm# that the other wa$elength# produce the #ame amount o% energy&photo#ynthe#i#'(

Conclusionwithout light the plant# will die+ under whit and red light are not much di%%erence# thu# that #ay#that red light produce# the #ame amount o% energy( )he #mall di%%erence in amount o% lea% could bethroe counting ore the amount o% %ertili er(

cant #ay i% we an#wered our 4ue#tion becau#e we did not recei$e all the data %rom the othergroup#(Recommendation# are add a automated %eeder #o you know %or #ure that i# not a %actor o% %ailing theexperiment( Second add a camera #o we can #ee how the plant# grow(

Literaturehttp;!!www(ecy(wa(go$!program#!w4!plant#!plantid2!de#cription#!lemmin(html9ampbell < Ree#e+ global =ditionhttp;!!hyperphy#ic#(phy*a#tr(g#u(edu!hba#e!biology!ligab#(html

http://www.ecy.wa.gov/programs/wq/plants/plantid2/descriptions/lemmin.htmlhttp://hyperphysics.phy-astr.gsu.edu/hbase/biology/ligabs.htmlhttp://www.ecy.wa.gov/programs/wq/plants/plantid2/descriptions/lemmin.htmlhttp://hyperphysics.phy-astr.gsu.edu/hbase/biology/ligabs.html