Sains Ogos 2015
.
55
© 2015 Hak Cipta BPSBPSK
[Lihat Halaman Sebelah SULIT
6. ai Able to name the type of support system of the plant shown
in the diagram R: Buttress root
S: Tendrils 2
ii Able to explain the importance support system for plant S
P1: To support the weight of plant S P2: To enable plant S to obtain light for photosynthesis
2
b
Able to describe how the special structure are developed and its function to maintain the sustainability of mangrove forest.
P1: The root are branching from the main stem P2: To support its stability in muddy water
Accept any reasonable answer
2
TOTAL 6
7. a
Able to calculate the force needed to lift the wheelbarrow. Answer:
Note :
Correct substitution value in the formula
–
1 mark Correct force value with correct unit
–
1 mark
2
b
Able to suggest one best way to use the wheelbarrow with justification
Suggested answer: P1: Encik Rahmat has to put his hand at the end of the handle
P2: It will increase the distance between effort and fulcrum
Note:
1 best way
–
1 mark 1 explanation
–
1 mark
2
c Able to explain which workers will fell exhausted first
Answer: P1: Worker A
2 Force X 0.4 + 0.8m = 48kg X 0.4m
Force X 1.0m = 48kg X 0.4m Force = 48kg x 0.4m
1.0m Force = 100 Newton
Sains Ogos 2015
.
55
© 2015 Hak Cipta BPSBPSK
[Lihat Halaman Sebelah SULIT
P2: Distance between force and fulcrum in worker A is less than worker B.
Note :
Correct worker
–
1 mark 1 explanation
–
1 mark
TOTAL 6
8 a
Able to fill in the blanks to show the correct movement of air Answers:
i Alveoli
Alveolus
ii Bronchioles
Bronkiol
iii Bronchus
Bronkus
iv Trachea
Trakea
Remark:
4 corrects
–
2 marks 3 corrects
–
1 mark 2 1 correct
–
0 mark
2
bi Able to state the relationship between respiratory rate and heart rate and give an explanation
Answer: P1: Heart rate increases because heart pump more blood to the
whole body P2: Respiration rate increases to supply more oxygen and
eliminate carbon dioxide 1
1
ii
Able to give the relationship between respiratory rate and oxygen concentration and give explanation
Answer: P1: Respiration rate increases while oxygen concentration
decreases. P2: Respiration rate increases to supply more oxygen while
oxygen concentration decreases because oxygen is used for respiration cell to produce energy
1
1
c Able to predict the changes of substance in the red blood cell
during exercise. Answer:
Carbon dioxide
: Increases
Bertambah
Glucose : Decreases
Berkurang
1 1
TOTAL 8
Sains Ogos 2015
.
55
© 2015 Hak Cipta BPSBPSK
[Lihat Halaman Sebelah SULIT
9.
a
Able to explain the steps that must be taken by the hospital ’s
staff before the blood can be given to Amin. Sample answer:
1. Interview the donors for their medical history
2. Screening the donated blood for compatibility with Amin
3. Screening the donated blood to make sure the blood free from
blood transmitted diseases
Accept any reasonable answer
2
b Able to explain in detail whether haemophilia patient can use
the blood donated by Amin’s family member
Suggested answer: 1.
P1: Yes if we use plasma component from the donated blood. 2.
P2: To increase his ability of the blood to clot. 3.
Note:
1 fact
–
1 mark 1 correct explanation
–
1 mark
2
ci
Able to state about Amin’s blood
Sample answer : -
Red blood cell count white blood cell count Amin’s still in normal range
- Haemoglobin platelet count lower than the normal range.
2 ii
Able to predict and explain what may happen to Amin when the reading of his white blood cell count increases.
Sample answer : P1: Amin may got bacterial infection fever body traumatize
P2: Increase the immunization in Amin’s body
The white blood cells are fighting against infections Note:
1 fact
–
1 mark 1 correct explanation
–
1 mark
2
TOTAL 6
Sains Ogos 2015
.
55
© 2015 Hak Cipta BPSBPSK
[Lihat Halaman Sebelah SULIT
10. ai Able to indicate the position of the kidney stone in the