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Name:Date:Group:Lab #

Title: Investigating the efect o light intensity on the rate o transpiration o aherbaceous plant by examining water uptae rom a photometer!

"ar cheme$nalysis an% Interpretation&acgroun% Inormation

TheoryDe'nitionsDescription o how (otometer wors)esultsDescription o tren% in resultsInterpretation o resultsDetermining total volume o *+, lost-xploration or results.onclusion

Limitations an% /or sources o error

$im: To investigate the efect o light intensity on the rate o transpiration o aherbaceous plant by examining water uptae rom a potometer!$pparatus: herbaceous plant0 measuring cylin%ers0an0%ropper0light sources!"aterials: water0 oil"etho%: 12!3 ,btain our herbaceous plants with their roots intact !-nsure all theplants the plants are o the same lea'ness0 height an% si4e!1+!3 Immerse the roots o each plant into separate measuring cylin%ers with 55 cm 6o water!16!3 (our 2 cm6o oil on the surace o the water to prevent evaporation o water!17!3 et up two experimental plants 1$ an% &3 68 cm away rom a light source with a98 watt bulb!1!3 (lace plant . in an area where there is no air movement! Leave this plant in anarea were there is no air movement! Leave this plant without an external lightsource!(lace plant D insi%e a %ar cupboar%!1;!3 -xpose plants $ an% & to the light con%ition or +7 hours!Then measure theheight o the water in the measuring cylin%er an% recor% it!)ecor% the level o waterin the potometer containing plant .!19!3 $llow the plants to ace light or another +7 hours an% recor% the level o waterin these potometers!)ecor% the water level in the photometers containing plants .an% D!1high light intensity0low light intensity an% no lightover a + %ay perio%!15!3 =se the %ata to construct a graph to show the volume o water transpire% romeach set o water un%er %iferent environmental con%itions!

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)-=LT:T$&L- *,?ING T*- @,L="- ,A ?$T-) T)$N(I)-D A)," T*- "-$=)ING

.BLIND-) =ND-) DIAA-)-NT LIG*T .,NDITI,N ,@-) $ T?, D$B (-)I,D!

(erio% .on%itions @olume o water inmeasuring cylin%er1cm63

@olume o waterremove% rommeasuring cylin%er1transpire% water3cm6

Day 8 1$t the start ?ith light

complete %arness

without lightDay 2 ?ith light

.omplete %arness

?ithout lightDay + ?ith light

.omplete %arness

?ithout light

.alculations or total volume o water transpire%:

(lants expose% to light:1(lant $/&3 C

(lant not expose% to a%%itional light 1without light31(lant .3:

(lant in complete %arness:1(lant D3

&$) G)$(* *,?ING T*- $.T=$L @,L="- ,A ?$T-) T$-N =( 1T)$N(I)-D3 &B(L$NT =ND-) DIAA-)-NT LIG*T .,NDITI,NInclu%e a ey! ?ith light0without 0 without light0complete %arness