Biologi Kertas 3 Pep Percubaan SPM

SUGGESTED ANSWER FOR 4551/3
QUESTION 1
ITEM
EXPLANATION
SCORE
REMARKS
NO
(a)
KB0603 - Measuring using numbers
Able to record all data correctly
Sample answer :
Volume of urine produced
Volume of
(ml)
water intake
First time
Second time
(ml)
500 ml
230
252
1000 ml
450
470
Able to record 3 data correctly
Able to record 2 data correctly
Not able to give any response or wrong response
(b) (i)
KB0601- Observing
Able to state any two observations correctly
Sample answer:
1. When 500ml mineral water were intake by two
students, first student produces urine about 230ml
and the second student produces urine about
252ml.
2. When 1000ml mineral water were intake by two
students, first student produces urine about 450ml
and second student produces urine about 470ml.
Able to state any one of the above observation correctly
and one idea of observation
Sample answer
1. When group of students A drinks less mineral
water, they produced less urine.
2. When group of students B drinks more mineral
water, they produced more urine
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Accepted
Any
suitable
answer
Able to state two ideas of the above observations
1
correctly
Sample answer
1. Group A produced less urine
2. Group B produced more urine
Not able to give any response or wrong response
0
KB0604 - Making inference
(b) (ii)
Able to state two possible inference for each observation
based on the following:
PI: More / less water reabsorbed from the tubule of
kidney into blood capillary
P2: High/ low blood osmotic pressure
Sample answer
1. Group A produces less urine because more water
is reabsorbed from the tubule of kidney into blood
capillary due to high blood osmotic pressure
2. Group B produces more urine because less water is
reabsorbed from the tubule of kidney into blood
capillary due to low osmotic pressure
2
Able to state any one possible inference for each
observation and one inference that less accurate
Sample answer
1. Group A produce less urine because more water
is reabsorbed from the tubule of kidney into
blood capillary //due to high blood osmotic
pressure
2. Group B produce more urine because less water
is reabsorbed from the tubule of kidney into
blood capillary // due to low blood osmotic pressure
1
Able to state two inferences but less accurate
Sample answer
1. Group A kidney's tubule reabsorbs more water
2. Group B have low osmotic pressure
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0
Not able to give any response or wrong response
KB0610 - Controlling variables
(c)
o
J
Able to state any 5-6 items from the table
Variable
Particular to be implemented
Manipulated
Used different volume of
variable
Volume of
water intake by each group of
water intake
student such as 500ml and
1000ml
Responding
variable
Record the volume of urine
Volume of
produce by using a measuring
cylinder
urine
variable :
Accepted
any suitable
produce
Constant
(d)
Constant
variable
Fixed the time about 30
Time
minutes before collecting the
urine produced by each group
(before
collecting
urine)
Same age
// carry out by the same age of
student
student
of student
2
Able to state any 3-4 items from the above
1
Able to state any 2 items from the above
0
Not able to give any response or wrong response
KB0611 - Stating a hypothesis
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answer
Able to write a complete hypothesis statement showing
the relationship between manipulated variable and
responding variable correctly.
PI = manipulated variable
P2 = responding variable
H = Link/ relationship
PI -
volume of
water intake
P2-
volume of
urine
produced
Sample answer:
1. The higher the volume of water intake, the higher
the volume of urine produced/ output.
2. If more / higher volume of water intake, so more /
higher volume of urine produced/ output
H-
relationship
* wrong
hypothesis
was
accepted*
Able to write any two from the above
PI and P2 // PI and H // P2 and H
Sample answer :
1. The different volume of water intake, the different
volume of urine produced
2.
The volume of water intake affect the volume of
urine produced
Able to write any one from the above
Sample answer :
1. The volume of water intake affect urine produced
Not able to give response or wrong response
(e)
KB0606 - Communicating
Able to prepare a table and shows the following:
H - Heading in the table are labeled with correct units
D - All data are correct
P - All the students are correct
Group of
Volume of
Volume of
Average
student
water intake
urine produce
of urine
(ml)
(ml)
first
second
produce
(ml)
A
500
230
252
241
B
1000
450
470
460
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2
Able to prepare a table and show the following
1.
1
HandD//DandP//HandP
Able to prepare a table and show the following
1.
Either H or D or P
KB0607 - Using spatial and time relationship
(0
Able to plot a bar chart with the following criteria:
i
j
P - all axis with uniform scale and correct units
T - all point is transferred correctly
B - all bar chart ware plotted
2
Able to give any 2 criteria correctly
1
Able to give any 1 criteria correctly
0
Not able to give response or wrong response
KB0608 - Interpreting Data
(g)
3
Able to explain the relationship between the volume of
water intake and the average of volume of urine produced
Sample answer:
El - If more volume of water intake, so more average of
volume of urine is produced
E2 - because low blood osmotic pressure
E3 - causing less water is reabsorbed from the
tubule of the kidney into blood capillary
2
Able to write any two from the above
El and E2 // El and E3 // E2 and E3
1
Able to write any one from the above
E1//E2//E3
0
(h)
Not able to give response or wrong response
KB0605 - Predicting
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1
Able to predict the
Sample answer :
El - volume of urine produced increased /
more than 460ml
E2 - because temperature is low/reduce
E3 - causing less water is reabsorbed from the tubule of
the kidney into blood capillary//due to less sweat is
produced
2
Able to state any two from the above
1
Able to state any one from the above
0
Not able to give response or wrong response
KB0609 - Defining by operation
00
3
Able to describe the concept of osmoregulation correctly
based on the observation
Sample answer
Osmoregulation is
El - a process of maintaining blood osmotic pressure
of the four student/student of group A and B
E2 - which can be determined by the volume of
urine produced by both student.
E3 - Volume of urine produced is affected by the
volume of water intake.
(i)
2
Able to state any two from the above
1
Able to state any one from the above
0
Not able to give response or wrong response
KB0602 - Classifying
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Able to classify correctly the list of apparatus and
materials according to the variables
Sample answer :
3
Variable
Pembolehubah
Manipulated
Manipulasi
Responding
Bergerak
Apparatus
Material
Radas
Bahan
Mineral bottle
Mineral water
Measuring
cylinder
Urine
Stopwatch
Student
balas
Controlled
Dimalarkan
2
Able to classify the list of apparatus and materials
according to any two variables
1
Able to state the materials in any one class completely
0
Not able to give response or wrong response
Suggested answer for Question 2
KB061201 - ( Problem statement)
Question
2(i)
Score
->
j
Explanation
Able to state the problem statement correctly :
PI : vigorous activities //different duration of running on
the spot
P2 : Percentage of carbon dioxide gas in exhaled air /
length of air column after being treated with
potassium hydroxide solution.
H : Question form
Sample answer:
1. Does the different duration of running on the spot affect
percentage of carbon dioxide gas in exhaled air /
length of air column after being treated with potassium
hydroxide solution ?
2. How do vigorous activities affect the percentage of
carbon dioxide gas in exhaled air / length of air column
after being treated with potassium hydroxide solution?
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Remarks
3. What is the effect of vigorous activities against
percentage of carbon dioxide gas in exhaled air?
2
Able to state a problem statement less accurately.
Sample answer:
1. What activity affects the carbon dioxide gas in exhaled
air
2. Can running on the spot affects carbon dioxide gas in
exhaled air?
3. What is the effect of miming on the percentage of carbon
dioxide gas in exhaled air?
1
Able to state a problem statement at idea level
Sample answer:
1. Exhalation gives out carbon dioxide gas.
2. Carbon dioxide content depend on vigorous activity /
different duration of activity.
0
No response or wrong response
KB061202 ( KB061203 - Making Hypothesis )
Question Score Explanation
3
2 (iii)
Able to state the hypothesis based on the following aspects:
PI = Manipulated variable = vigorous activity//different
duration of rumiing on the spot
P2 = Responding variable = percentage of carbon dioxide
R
gas in exhaled air // length of air column after being
treated with potassium hydroxide solution.
= Relationship / Link
Sample answer :
2
1. As duration of running on the spot increases, the higher
the percentage of carbon dioxide gas in exhaled air /
length of air column after being treated with potassium
hydroxide solution, (vice versa)
2. As more vigorous of an activity, the higher the
percentage of carbon dioxide gas in exhaled air / length
of air column after being treated with potassium
hydroxide solution, (vice versa)
Able to write a hypothesis statement less accurately
Sample answer:
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Remarks
Wrong
hypothesis
accepted
as long
there is
P1JP2
1. As activity increases, the carbon dioxide also increase.
2. Different activities affect different percentage of carbon
dioxide gas
Able to state a hypothesis at idea level
Sample answer:
1
1. Carbon dioxide produced in exhaled air
No response or wrong response
0
Able to state all the three variables correctly
Sample answers :
VARIABLE
2(iv)
Manipulated variable = vigorous activity
//different duration of running on
the spot
Responding variable = percentage of carbon dioxide gas
in exhaled air // length of air
column after being treated with
potassium hydroxide solution.
Constant variable = same student / type of J-tube
KB06i205
(Apparatus and materials)
Explanation
-
Question
Score
2(v)
->
Remarks
Able to list out all the important apparatus and materials
correctly.
Sample answers:
Apparatus:
J-tube, boiling tubes, rubber tubing, ruler , stopwatch
Materials:
Student, water basin, potassium hydroxide solution,
exhaled air, distilled water
1
Able to list 3 apparatus and 3 materials correctly
Able to list 2 apparatus and 2 materials correctly
0
No response or incorrect response
2
KB061204 (Experimental Procedure)
Question Score Explanation
2(vii)
Able to describe all the steps of the experiment correctly
Note:
Kl: preparation of materials and apparatus
K2: operating the constant variable
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Remarks
K3: operating responding variable
K4: operating manipulated variable
K5: Step to increase reliability of result
accurately/precaution
To get
Kl, must
include at
least 4K1
Sample answers
1.
Kl
J-tube is unscrew clockwise to the end.
2. The open end of J-tube is lowered into a basin of water
Kl
3. 5cm of water is drawn into the J-tube by turning
anticlockwise. The screw is turned clockwise again to
K1/K2
expel some water. The J-tube is placed into the basin.
4. When student is resting for 0 minute, a sample of
exhaled air is collected through rubber tubing which is
inserted into a boiling tube filled with water
5. Then the open end of J-tube is placed into the boiling
tube containing exhaled air
6.
Kl
Kl
The screw is turned anticlockwise to draw some exhaled
Kl
air into the capillary tube.
7. Then the open end of J-tube is dip into potassium
hydroxide solution.
8.
Kl
The screw is turned clockwise and anticlockwise to
allow carbon dioxide being absorb by potassium
hydroxide solution.
9. Record the length of air column in J-tube by using a ruler
after being absorbed by potassium hydroxide solution.
Avoid touching the J-tube
10. Repeat Step 4 until 9 to the same student by running on
the spot for 1 minute, 2 minutes and 3 minutes .
11. All results are recorded in a Table.
-1
2
1
0
KB061206
Question
Kl
K3
K5
K2/K4
Kl
All the 5 K's
Any 3-4 K's
Any 1-2 K's
No response or incorrect response
( Presentation of Data)
Score
Explanation
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Remarks
Presentation
of Data
2(viii)
Able to present all the data with units correctly
Based on :
PI: Title with correct units
P2: Sample for vigorous activity
Sample answer:
(Types of)
vigorous
activity//Duration
of running on the
Length of air column
after being treated with
potassium hydroxide
solution (cm)
Percentage of
carbon dioxide
in capillary tube
/J-tube (%)
spot
Resting for 0
minute
Running on the
spot for 1 minute
Running on the
spot for 2 minutes
Running on the
spot for 3 minutes
Any PI orP2
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