Sc P2 Trialpmr Phg 08(ans)

SKEMA JAWAPAN PEPERIKSAAN PERCUBAAN PMR SCIENCE PMR 2008 No. 1(a)

Skema M: Plant cell N : Animal cell 1 mark for each correct answer

Markah 1 mark

Jumlah 2 marks

1 mark

1 mark

1 mark

2 marks

1 mark

1 mark

Total

6 marks

1 mark 1 mark

1 mark 1 mark

1(b) Q R

S P 1(c)

Structure Struktur

Q

Function Fungsi

Regulates the movement of substances in and out of the cell Protects and maintains the shape of the cell

R Controls all activities of the cell

S

Contains cell sap

1 mark for each correctly matched pair 1(d)

2(a)(i) 2(a)(ii)

Nucleus//Cytoplasm// Cell Membrane 1 mark(either one)

Organism B Because it makes its own food.

2(b)(i) 2(b)(ii)

2(c) 2(d) 2(e)

Four// 4 • Paddy plant→Grasshopper→Lizard→Eagle • Paddy plant→Rat→Snake→Eagle • Paddy plant→Rat→Eagle • Paddy plant→Rabbit→Eagle 1 mark (either one answer) The other animals in the food chain will starve and reduce in numbers There will be a decrease in the paddy population// There will be an increased in snake population The sun

3(a)

1 mark 1 mark

1mark 1 mark

1 mark

1 mark

1 mark

1 mark

1 mark Total

1 mark 7marks

1 mark

1 mark

1 mark 2 marks

1 mark 2 marks

1 mark

1 mark

‘

3(b) 3(c)

Phloem tissues • The removal of phloem cells/tissues stop manufactured food from moving downwards thus food accumulates in the region above the ring. • The manufactured/synthesized food is unable to move downwards thus food substances accumulate in the regions above the ring

3(d)

X

3(e)

4(a)

4(b)

4(c) 4(d) 5(a) 5(b)(i) 5(b)(ii)

Phloem tissues/ cells transport manufactured(synthesized) food from the leaves to the stem and roots// Phloem tissues/ cells transport manufactured(synthesized) food from the leaves to all parts of the plants

1 mark

1 mark

Total

6marks

P: Solid Q:Gas R:Liquid 1 mark for each correct answer P:Arrangement of particles are compact and orderly // closely packed // particles vibrate in their respective positions Q:Arrangement of particles are very loose and disorderly // particles move randomly //particles move fast // particles move freely Any suitable answers: Oxygen ; Carbon dioxide ; Nitrogen, etc By heating

1 mark

3 marks

1 mark

2 marks

Fractional Distillation of Petroleum The higher the boiling point of a fraction, the darker its colour P:Petrol Q:Kerosene R:Diesel S:Lubricating oil

1 mark 1 mark

1 mark

1 mark Total

1 mark 7marks

1 mark 1 mark

1 mark 1 mark

2 marks

2 marks

1 mark

1 mark

5(c)(i)

Any two correct answers Fuel for motor vehicles and airplanes.

5(c)(ii)

Because P is a non-renewable form of energy

1 mark Total

1 mark 6marks

6(a) 6(b) 6(c) 6(d)

Reading of X = 0.48 A The ammeter reading will decrease. 0.44 A The current flow in a circuit decreases as the resistance increases // As the resistance in a circuit increases, the current flow in a circuit decreases.

1 mark 1 mark 1 mark 1 mark

1 mark 1 mark 1 mark 1 mark

6(e)

√

√

1 mark

2 marks

1 mark

2 marks

Total

8marks

1 mark

4 marks

A

6(f)

1 mark for each correct answer Resistance (R) = Voltage (V) Ampere (A R = V I R = 0.6 V 0.2A = 3.0 Ohm // 3.0Ω 1 mark for correct substitude of numbers 1 mark for the correct answer

7(a)

J: Made up of two particles//made up of one type of particles// K:Made up of two particles//made up of two different types of particles L:Made up of eight particles//made up of one type of particles M:Made up of three particles//made up of two different types of particles 1 mark for each correct answer

7(b)

1 mark

4 marks

Total 1 mark

8marks 1 mark

1 mark

1 mark

1 mark

1 mark

Oxygen, Sodium chloride, Sulphur, Water Oksigen, Natrium klorida, Sulfur, Air

Made up of more than one type of particles

Made up of one type of particles

Sodium chloride and water

Oxygen and sulphur

Ciri

Nama

Oxygen, Sodium chloride, Sulphur, Water Oksigen, Natrium klorida, Sulfur, Air

Made up of two particles

Made up of more than two particles

Oxygen and sodium chloride

Sulphur and water

Ciri

Nama

1 mark for each box. 8(a)(i)

(Shirt in) Situation A takes a shorter time to dry compared to the (shirt in) Situation B// (Shirt in) Situation A dries faster than (shirt in) Situation B (Shirt in) Situation B takes a longer time to dry compared to (shirt in) Situation B// (Shirt in) Situation B dries slower than (shirt in) Situation A

8(a)(ii)

Black shirt absorbs heat better/faster than white shirt// White shirt absorbs heat slower than black shirt// Absorption of heat depends on the colour of the shirt

8(a)(iii) Black shirt absorbs heat better than white shirt//

Black surface absorbs heat better than white surface// The darker the colour, the faster the shirt dries// The darker the surface, the faster it absorbs heat

8(b)(i) Final temperature (OC) Rise in temperature (OC)

Q

35 OC

31 OC

1 mark

7 OC

3 OC

1 mark

8(b)(ii) Rise in temperature (oC)

2 marks

P

2 marks

2 marks

1 mark

1 mark

1 mark

1 mark

1 mark 1 mark 1 mark

1 mark 1 mark 1 mark

Total

12marks

8

6

4

2

8(b)(iii The rise in temperature in P is higher than Q// The rise in temperature in P and ) P Q Q are different higher the rate of heat 8(b)(iv) The darker the surface, theConical Flask

absorption A dark/black coloured surface absorbs heat faster than a light/white coloured surface

8(c)

Type of surface Rise in temperature//Final reading of thermometer Distance of flask from Bunsen burner//Size of flask