14583447 microorganisms 2
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Name : . Class :
Date :.
Topic : Microorganisms undergo life processes
1. Syazana carries out an investigation by sprinling a fe! drops of !ater on a slice of
bread. S"e puts t"e bread in a plastic bag and observes it for a fe! days.
T"e table belo! s"o!s t"e number of blac spots recorded by #mirul in four days.
Day
Number of blac
spots
1
$
$
%
&
'
(
1(
a) Name t"e blac spots appeared on t"e bread .
..
b) *"at is t"e purpose of t"is e+periment, -tuuan penyiasatan)
.
c) State an observation based on t"e result in t"e table above.-pemer"atian )
d) /ive an inference based on your ans!er in -b)-beri sebab)
...
e) *"at can you conclude from t"is investigation ,-esimpulan)
..
ENCIK MOHAMAD NAZRI BIN BASIRUN
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CODE :5.2008.2
N#M0 : C#SS:.
D#T0 :
TOPIC : MICROORGANISMS UNDERGO LIFE PROCESSES.
QUESTION 2
2igure 1 s"o!s one plastic bag !it" a piece of moist bread in it3 !"ile t"e ot"er plastic
bag "as a piece of toasted bread on it. 4ot" plastic bags are placed in a !arm place for
t"ree days.
Table 1 s"o!s t"e results of t"e e+periment.
Brea
Moist bread
Toasted bread
T!e "#$%&%#$ #' (rea a'&er &!ree
a)*
4lac patc"es can be seen on t"e bread
No c"anges
a) 5n t"is e+periment
i) *"at is c"anged ,
ii) *"at is observed,........................................................................................
iii) *"at is ept t"e same ,..............................................................................
b) *"at is t"e purpose of t"is e+periment ,
...
..
c) State on "ypot"esis t"at can be build in t"is e+periment.
..
.
d) /ive an inference based on t"e condition of moist bread after t"ree days,
.
.
e) *"at is t"e relations"ip bet!een t"e presence of !ater and t"e gro!t" of mould,
.
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TOPIC : MICROORGANISMS UNDERGO LIFE PROCESSES.
QUESTION +
T"e table belo! s"o!s t"e number of pupils of Seola" 6ebangsaan St. #nne7s
Convent "aving disease 8 from day 1 until day %.
Da)
1
$
&
(
%
N,-(er #' ,%/* !a%$1 %*ea*e
9
1
1(
1;
$$
a) *"at "appen to number of pupils "aving disease 8 from day 1 until day % ,
b) /ive your inference from your observation in
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TOPIC: MICROORGANISMS UNDERGO LIFE PROCESSES
(. T"e diagram belo! s"o!s an investigation carried out by #imi Nadia . Se
fills $ teaspoons of dried yeast3 1 teaspoon of sugar and 1 ml of !ater
into a test tube. T"e mout" of t"e test tube is attac"ed to a balloon.
T"e table bello!s s"o!s t"e circumference of t"e balloon in % days.
1Da)
C%r",-'ere$"e 9
#' &!e (a//##$
3"-
$
;
&
1
(
1$
%
1(
a) State one observation based on t"e result in t"e table above.
b) /ive an inference based on your ans!er in -a)
.
c) *"at is t"e function of sugar in t"e test tube ,
..
d) *"at "appens to t"e circumference of t"e balloon !"en t"e day of
investigation increases ,
..
..
e) *"at is t"e aim of t"is investigation ,
.
.
g) *"at conclusion can you mae from t"is investigation,
..
ENCIK MOHAMAD NAZRI BIN BASIRUN
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TOPIC: MICROORGANISMS UNDERGO LIFE PROCESSES
TOPIC : MICROORGANISMS UNDERGO LIFE PROCESSES
%. 2aizal carries out an e+periment on a slice of bread. >e taes t"e
follo!ing steps:
Step 1:
Step $:
Step &:
Step (:
Sprinles a fe! drops of !ater on t"e bread.
=uts t"e bread in a plastic bag.
?bserves t"e bread after four days.
@ie!s t"e sample of bread under a microscope.
T"e diagram s"o!s t"e observation obtained by 2aizal.
4read
@ie!ed under microscope
Moulds
-a) *"at can be observed after four days,
i. #re t"e moulds microorganisms,
444444444444444444444444
/ive reasons for your ans!er in -b) i.
444444444444444444444444
-b)
ii.
-c) To !"ic" group of microorganisms do t"e moulds belong to,
444444444444444444444444444
4ased on t"e diagram3
i. !"ere do t"e moulds come from,
44444444444444444444444..
ii. *"y do t"e moulds gro! on t"e bread,
44444444444444444444444.
*"at !ill be observed if t"e bread is left for anot"er t!o days,
.
-d)
-e)
ENCIK MOHAMAD NAZRI BIN BASIRUN
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TOPIC: MICROORGANISMS UNDERGO LIFE PROCESSES
TOPIC : MICROORGANISMS UNDERGO LIFE PROCESSES
9. #idura prepared t"ree slices of meat of t"e same size and labeled t"em
!i" A36 and. S"e ept t"ese meat at different paces and observed t"e rate of
decaying. Table 1 s"o!s t"e results obtained.
Mea&
A
6
P/a"e* !ere &!e -ea&
are 6e&
Befrigerator
iving room
4at" room
De"a)%$1 ra&e #' &!e
-ea&
@ery slo!
2ast
@ery fast
a) *"at is t"e aim of t"e investigation ,
..
.
b) State t"e follo!ing variables :
i)
ii)
t"ings is c"anged :
t"ings is observed : ..
c) State t!o factors t"at you s"ould ept t"e same if you !ant to prove t"at
t"e decaying rate of t"e meat depends on t"e places !"ere t"e meat areept.
c) *"y does meat A undergo a very slo! decaying rate,
..
d) *"at type of environment promotes t"e fastest gro!t" of microorganisms ,
.
e) *"at is t"e relations"ip bet!een places !"ere t"e meat are ept and t"e
decaying rate of t"e meat ,
..
..
-f) 2rom t"is e+periment3 give one reason !"y moulds are considered as
living t"ings.
.
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Na-e :4444444444444444. C/a** :4444444 Da&e:44444.
Q,e*&%#$ 7
D%a1ra- *!#* a$ %$e*&%1a&%#$ "arr%e #,& () N#r-a/a. S!e -%e a #,1! %&! 9
&ea*##$ #' )ea*&. T!e #,1! a* /e'& #$ a &a(/e '#r !#,r*.
a ;!a& !ae$* &!e #,1! a'&er 2 !#,r*
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