220255117 skema-sains-ppt-tingkatan-3-perak-2010-4
TRANSCRIPT
SULIT
JABATAN PELAJARAN PERAK
PEPERIKSAAN PERTENGAHAN TAHUN 2010TINGKATAN 3 SCIENCE Mei / Jun2010
SCIENCEPAPER 1 & 2
PERATURAN PEMARKAHAN
1
Jabatan Pelajaran Negeri Perak
Peperiksaan Selaras Pertengahan Tahun 2010
Skema Sains Kertas 1
No soalan
Jawapan No soalan
Jawapan No soalan
Jawapan No soalan
Jawapan
1 B 11 B 21 B 31 A2 C 12 C 22 D 32 D3 B 13 A 23 A 33 D4 C 14 C 24 C 34 A5 D 15 C 25 B 35 D6 A 16 C 26 A 36 B7 B 17 A 27 D 37 C8 B 18 A 28 D 38 D9 C 19 B 29 B 39 B
10 A 20 D 30 C 40 C
Skema Sains Kertas 2
2
Questions Rubrics Marks 1 a (i) Q : compression
R: lever S : beamb. weight : compression balance/ spring balance mass : lever balance
3 correct - 2m2 correct, 1 wrong - 1m1 correct , 2 wrong - 0 m 1 correct without wrong – 1 m
c. kilogram/ kg
1 each
3m
2m
1mTotal : 6m
2 a (i) from the blood capillary to the body cells
Reject: line without arrow : sentence
(ii) diffusion b X : higher concentration / more (than Y) y: lower/ less concentration ( than X)
NOTE : The answer should show the comparison
c. oxyhaemoglobin
d. (i) reduce the transportation of Oxygen to the body cells.// body cells will lack of Oxygen
(ii)use lead – free fuel/ unleaded petrols// (catalytic) converter to the exhaust// Car pooling// use public transport// maintan vehicles under good condition
1m
1m
1m
Any 1 correct: 1m
Total : 6m
3
3
4
5
a) increase in size // increase in number of cells// increase in weightb) Infancy/ adolenscence // teenagersc) i. adolenscence
ii. female reach puberty faster earlier than male/male reach puberty late than female./ female reach puberty at the age of ( 11 to 14) but male reach puberty at the age of ( 14 to 16)
d. i) protein /calcium ii) protein: build new tissue/ /formation of cell calcium : formation of born / teeth
a. i) hydrogen ii) lighted wooden splinter will produce ‘pop’ sound
b. to increase the conductivity of electricity// to make water a better conductivity.
c. I) q: p = 10: 5 = 2:1d. Water consist of 2 hydrogen atoms & 1 atom oxygen
Accept: correct drawing
a i) fulcrum is in the middle // fulcrum is between the load and effort// the load & effort act in the same direction ii) scissors / pliers / claw hammer/ can opener accept: any suitable first class device.
iii) effort is less than the load// use lesser/ smaller effort b i) P 1: the see saw will be not balance/ imbalance // boy N will go upwards// boy M moves downwards/ P 2: the movement of force of M is greater / bigger// The moment of force of N is lower / smaller// the moment of force of M is bigger / smaller that M is vice versa.
1 m
Any -1 m1 m
Any 1- 1 m
1m 1m
Total : 6m
1 m1m1 m
1 m1 m
Total : 6m
1 m
2 m
1 m
1 m
4
O H
H
6
b ii. M moves towards the pivot/ fulcrum.
c.
a. Radiation b. i.
note: accept the arrow drawn outside the box.
ii. P1: P / black surface / dull surface absorbs more heat ( compare to Q / silver surface/ white surface) P2: Air in conical flask P expand more
P3: volume of air in conical P increases more
P4: ( The air in conical flask P pushes the red ink towards Q)
c.Chemical energy heat energy kinetic energy
d i. white
ii.P1: ( white colour) reflect more heat/ absorb less heat
P2: temperature in the house lower/ the condition in the house cooler note : reject any reason relate to black and brown surface.
1m
1 m1 M1 m
Any 2
1 m
1 m
2 m
Total: 8 m
5
/
7a) P : hydrostatic skeleton
Q : endoskeleton R : hydrostatic skeleton S : exoskeleton
b, i. aquatic / marine /sea/ ocean
reject : water/ any fresh water habitat
ii. water support the body weight// ( the body can be supported by ) water buoyancynote: b (ii) is independent of b(i) in condition the answer in b(i) is aquatic habitat.
Eg: b (i) = lake(x) b(ii) ; lake water support the body weight(/)
4 m
1 m
4 m
Total: 10m
6
8.
a.i) the air pressure of the tyre of the bus is higher ( than the car)// vice versa
ii) the higher the size of vehicles the higher the air pressure in the tyre // vice versa// when the size of the vehicles bigger/ increases the air pressure in the tyre increases// vice versa
b i) 40 o C = 108 / 108.5/109 50 o C = 112
60 o C = 115
70 o C = 119
4 correct = 2 marks2-3 correct = 1m1 correct = 0 m
ii) the air pressure /reading of B. gauge depends on/ influence by the
2 m
1 m
2m
7
P, Q, R and S
Hydrostatic skeleton Endoskeleton
exoskeleton
P, R/ Worm and jellyfish
Q S / grasshopper
Air Pressure,kPa 120
115
110
105
100
temperature.
The temperature affects the air pressure //
The higher the temperature, the higher the air pressure/ reading of B. Gauge// vice versa
As the temperature increases the air pressure increases
c. Manipulated variable: temperature( of water) Responding variable: air pressure / B. Gauge reading
d.
8
30 40 50 60 70
Temperature, oCCorrect all points = 1 m Smooth straight line = 1m
e. Air pressure is the reading of Bordon Gauge.
2m
1 m
Total :10m
9