Druga gimnazija Sarajevo

Lab Report
How does the temperature affect germination of the seed?
December, 20!
Student" #erim $anjeta, %% &'$
Introduction:
(his )ab report*s main focus wi)) be the germination of the seed and how do the certain effects
affect the seed +temperature most),-! .)so, % wi)) co))ect, record data, organize, ana),se and
present the data using numerica) and visua) forms!
(he prob)em that can be considered in this wor/ can be the data that % am co))ecting for a
wee/ now, that is wi)) the corn seed deve)op as it shou)d according to the
h,pothesis!0ermination is the process in which a p)ant deve)ops from a seed or spore,
respective),, and begins growth! (he most common e1amp)e of germination is the sprouting
of a seed)ing from a seed of an angiosperm or g,mnosperm! 2actors which affect seed
germination inc)ude moisture, temperature and light! 3ne wa, in which global warming
potentia)), cou)d affect the bio)og, of weeds is b, the changes in the germination
re4uirements of seeds in spring and ear), summer! Seeds of some summer annua)s wou)d not
germinate as ear), in spring as the, do now! 5hanges in germination pheno)og, wou)d be in
response to periods of re)ative), high temperatures in winter!
(he prob)em that can be considered in this wor/ can be the data that % am co))ecting for a
wee/ now, that is wi)) the corn seed deve)op as it shou)d according to the h,pothesis!
Hypothesis:
% predict that the germination of the seeds is going to happen much faster in the high
temperatures +seeds that are )ocated on the heater- then in the )ower temperatures +seeds that
are )ocated in the room temperatures and ba)con, co)d temperatures-! %n the case of m, wor/ %
predict that the seeds that wi)) be )ocated on the heater wou)d germinate in a much bigger
number then the seeds that wi)) be )ocated in the room temperature and ba)con,!
Scientific reasoning"
% made this h,pothesis based on the common /now)edge that higher temperatures stimu)ate
seeds with proper 4uantit, of moisture and )ight aswe))!
Aim:
(he aim of this )ab report is to see the germination of the corn seeds, that is when the
germination is higher or )ower! 3nce more % wi)) mention that g)oba) warming cou)d affect
our wor)d because certain seeds are germinating much better and in the )arger number!
Procedure and Method used:
Last wee/, % was preparing for m, )ab report and % did fo))owing procedure"
% bought 60 corn seeds and % p)aced them into 7 different groups! % p)aced cotton woo) on the
bottom of the sma)) buc/et, then % put 20 corn seeds onto the woo) and then % have put it on
the ba)con,! % repeated the process, % p)aced cotton woo) on the bottom of the sma)) buc/et
that was identica) to the one before, then % put 20 corn seeds onto the woo) and % have put it in
m, room! .nd for the )ast time % too/ the same sma)) buc/et, inputed the cotton woo) and on
the woo) % have put the )ast 20 corn seeds, % p)aced this buc/et on the heater in m, room! 8ust
to mention that % sipped some water over the cotton woo) so that the seeds cou)d start
growing!
9ver, night % was regu)ar), chec/ing up on m, seeds, ta/ing photo of them to serve as a proof
and a)so % added water on the cotton woo) if it was necessar,! .dding the water was ver,
de)icant process because the buc/et that was )ocated on the heater wou)d evaporate the water
ver, 4uic/),, so % had to add the water in that buc/et more fre4uent),! (he one on the ba)con,
was a)most in no need of the water at a)), % sipped water once or twice! .nd the buc/et on the
room temperature re4uired water more fre4uent), than the buc/et on the ba)con,, but )ess
water then the buc/et on the heater! (he 4uantit, of water that % was adding was not high
because % a)wa,s sipped enough water so that the cotton woo) sta,s wet! Having too much
water in the buc/et wou)d not be good, so % too/ care of it! .)so, % was constant), monitoring
how man, seeds did germinate ever, night, that is to test m, h,pothesis! % measured how
man, seeds germinated ever, night in the same time frame, 2"00 : 2";! (hose information
wi)) )ater on serve me to ma/e a data tab)e!
Materials:
60 corn seeds
7 same sma)) buc/ets
(he camera
<ater
7 different p)aces with different temperatures +room temperature, heater temperature, ba)con,
temperature-
Processing Data:
(he seeds that germinated on the heater
+picture ta/en b, me, 6!2!20!-
Da,s =umber of
germinated seeds
(emperature
in 5e)sius
0 2>
2 0 2?
7 7 2?
@ 7 70
; 7 2?
6 7 2A
A 7 2>
(his tab)e present the data that was co))ected through A da,s about the seeds that germinate on
the heater! 2irst 2 da,s not one sing)e seed germinated, but on the da, 7! the number of
germinated seeds was 7 and it sta,ed that wa, for the entire wee/! (his does not )oo/ too
promising! (he temperature varied from 2A:70! +in 5e)sius-! ;B of the entire seeds were
germinated!
(he seeds germinated at the room temperature"
+photo ta/en b, me, 20!2!20!-
Da,s =umber of
germinated seeds
(emperature
0 22
2 0 2
7 2 22
@ 7 22
; @ 20
6 6 >
A 6 22
(his tab)e represents the data of seeds germinated at the room temperature! .s we can see,
first 2 da,s there was no germinated seeds, but on the 7! da, the number s)ow), started to
raise, and eventua)), at A! da, the number of germinated seeds reached 6! (he temperature
varied from >:22! +in 5e)sius-! 70B of the entire seeds were germinated!
(he seeds germinated in the co)d temperature, on the ba)con,"
+photo ta/en b, me, A!2!20!-
Da,s =umber of
germinated seeds
(emperature
0 ;
2 0 @
7 0 @
@ 2 ;
; 2 7
6 2 ;
A 7 ;
%n this tab)e ,ou can read the data that % co))ected for the seeds that germinated in the co)d
temperatures, on a ba)con,! .s we can see the number of the germinated seeds for the first 7
da,s were 0! However, on the @! da, the number of germinated seeds rose to 2 and sta,ed )i/e
that ti)) A! da,! 3n the A! da, % ca)cu)ated that there were 7 germinated seeds! (he temperature
varied from 7:;! +in 5e)sius-! ;B of the entire seeds were germinated!
The 3 tables:
.s we cou)d conc)ude from the fo))owing 7 tab)es, the seeds that were germinating in the
room temperature were the most succesfu)! (he other too, that is the seeds that were )ocated
on the heater +higher temperatures- and the seeds that were )ocated on the ba)con, +)ower
temperatures- were e4ua)), succesfu)! (o he)p us understand a bit better these datas, % wi))
draw a graph that wi)) contain a)) 7 groups of seed germination!
dependent variab)e : seeds
independent variab)e : temperature
The graph:
Number of seeds that germinated over
the time taken to germinate (7 days)
0
1
2
3
4
5
6
7
1st day 2nd day 3rd day 4th day 5th day 6th day 7th day
Hot
Mid
Cold
(he graph presented here made the information even more c)ear! Hot +b)ue )ine- represents the
seeds that germinated on the heater +highest temperatures-, the &id +pin/ )ine- represents the
seeds that germinated in m, room +medium temperature-, and fina)), the 5o)d +,e))ow )ine-
represents the seeds that germinated on the ba)con, +)owest temperatures-! 3n the )eft side
+vertica)- the number of seeds that germinated is )ocated, and in the horizonta) position there
are the number of da,s! <e can see that the most productive temperature for the germination
was the temperature of the room!
(he agricu)tura)), important seeds are studied on the different temperatures pure), because of
the econom,! %f scientists find a wa, to germinate more seeds in a )ess amount of time that
means that that wa, wou)d be much more usefu) for the econom,! Casica)), the more seeds
that germinate in a sma))er amount of time, the better the profit is!
<hen % compared m, corn seed graph with the others graphs of different seeds, % found that"
% too/ the graph of (ari/ HadzoviD*s wheat and % found out that he had simi)ar prob)em, his
wheat that was )ocated on the room temperature was the most productive, then his wheat that
was )ocated in the co)d environment, and on the )ast p)ace the wheat that was )ocated on the
heater with hot environment! .)so, it was ver, interesting that a)) of his seeds did manage to
germinate in the room temperature +a)) 20 of them-!
<hi)e ana),zing %rma LuguEiD*s bean*s there was comp)ete), different resu)t then from mine
and (ari/*s! %rma*s beans were the most succesfu) in the co)d environment, )ess succesfu) in
the room temperature and the )east succesfu) in the e1treme), hot environment +probab),
heater-! <ith a)) of these information, % wi)) now summarise ever,thing in a ver, important
part, conc)usion!
Conclusion:
(o conc)ude this )ab report % can sa, that first of a)) % have )earnt a )ot about the
germination! % a)so mentioned the importance of g)oba) warming and the deve)opment of the
seed according to the time of the ,ear! (he h,pothesis % predicted was not correct and % am
fee)ing a bit sad that it didn*t wor/ as p)anned! % said in m, h,pothesis that the seeds that are
)ocated in the warmest environment wou)d be the most productive ones but that was not the
case! (he most productive seeds were )ocated in the environment with medium temperature,
that is the room temperature! % need to give reasoning wh, m, h,pothesis was not correct!
<e)), first of a)), a)) seeds have a certain temperature gap that the, can deve)oped! % be)ieve
that the heater had too hot temperature for the deve)opment! (he proof of that can be seen on
the corn as the b)ac/ mar/s on it*s surface! .)so, the warmer environment was evaporating the
water more 4uic/), and ma,be % didn*t input needed amount of water regu)ar),! 3n the other
hand, the corn seeds that were in the room temperature had an idea) environment! %t was fu))
of moisture, )ight and enough temperature to deve)op! (hose are the main reason for the
h,pothesis that % made, and it is incorrect! Cut a)so, we can see from the e1amp)es of the other
students that neither their seed was best at the warmest temperature, which means that the,
a)so provided too much heat for the seeds! % co))ected and provided data that are re)evant and
re)ib)e for this )ab report!