55/2 SCIENCE PMR Ogos 200 PEPERIKSAAN PERCUBAAN PENILAIAN MENENGAH RENDAH 200 SCIENCE KERTAS 2 PERATURAN PEMARKAHAN UNTUK KEGUNAAN PEMERIKSA SAHAJA Peraturan pemarkahan ini mengandungi 4 halaman bercetak

2 No. Marking Scheme Sub Marks (a) Able to label parts P, Q, and R correctly Total Mark P : Prominence Q : Sunspot R : Solar flares 3 (b) Able to match the phenomenon correctly. Neutron star Bintang neutron Black hole Lohong hitam White dwarf Kerdil putih 3 Y Z X Total 6

3 No. Marking Scheme Sub Marks 2 ( a ) Total Marks ( i ) Able to state the method. Water displacement ( ii ) Able to determine the volume of stone 27 ml/cm 3 unit must be written [ without calculation ] 2 Able to determine the volume of cork 3 ml/cm 3 unit must be written [ without calculation ] 2 ( b ) ( i ) Able to name apparatus P correctly. P external calipers ( ii ) Able to determine the thickness of boiling tube s wall correctly (3.0 cm - 2.5 cm) = 0.25 cm unit cm must be written 2 2

4 No. Marking Scheme Sub Marks Total ( c ) Able to choose the suitable apparatus correctly. Thread Benang Ruler Pembaris Total 6 No. Marking Scheme Marks Total 3 ( a ) ( i ) Able to name substance L correctly. Metal/iron/copper/ any example of metals. ( ii ) Able to make conclusion based on their properties. Copper/L is metal which conducts electricity while sulphur/k is non metal which does not conduct electricity. 2

5 No. Mark Scheme Marks Total 3 ( b ) ( i ) Able to choose the correct sequence correctly 4 3 2 (b) Salt,sand and water Garam, pasir dan air Mixture of sand, iron filings and salt Campuran pasir, serbuk besi dan garam Magnet Note: 4 correct, award 2 marks 3 correct, award mark 2 or correct, award 0 mark 2 2

6 No. Marking Scheme Marks Total 3 ( c ) ( i ) Able to give correct observation. Iron filings are attracted to the magnet but sulphur powder is not attracted to the magnet. [ accept any suitable answer ] ( ii ) Able to state the properties correctly The product cannot be separated by physical method // The product can be separated by chemical method. [ accept any suitable answer ] 2 Total 6 No. Marking Scheme Marks Total 4 ( a ) Able to arrange the sequence correctly R,Q, and P (b ) Able to name the solution correctly Dilute solution

7 (c ) Able to give two factors that affect the rate of dissolving correctly. The volume of solvent/water 2. The temperature of solvent/water 3. Size of solute/sugar 4. Rate of stirring + 2 (d ) Able to give the suggestion Sample (i) Increase the volume of solvent /(distilled) water into beaker R//add more water (ii) Add more (distilled) water to beaker R, so the density of solution will be reduced and the egg will sink. Total 6

8 No. Mark Scheme Marks Total 5 (a) (i) Able to draw the curve correctly (ii) Able to state the growth pattern Infancy: Rapid growth Adulthood: Minimal growth + 2 (b)(i) Able to make conclusion based on the graph at the age range 3 to 5 The growth rate of girl is higher than boy. (ii) Able to explain the factor that make the difference growth rate between the girls and boys : A girl reaches puberty earlier than boy. (iii) Able to state the age that the girl reaches height of 40 cm : 3 years old

9 (c)(i) Able to name the disease : Kwashiorkor (spelling must correct) (ii) Able to name the class of food : Protein (reject any example of proteins) Total 8 No. Marking Scheme Marks Total 6(a)(i) Able to draw electric circuit. Sample + 2 R S (ii) Able to state the way ammeter and voltmeter are connected. Sample In circuit R, ammeter is connected in series, while in circuit S, voltmeter is connected in parallel. (b)(i) Able to state the relationship between V, V, and V 2. Sample V= V =V 2 // voltage V is equal to V and V 2.

0 (ii) Able to state the relationship between I, I, and I 2. Sample I= I + I 2 // The current I is equal to the sum of I and I 2. (iii) Able to state the relationship between R, R, and R 2. Sample = + (c)(i) Able to state the difference in brightness of the bulb P in Circuit and Circuit 2. (ii) Bulb P in Circuit 2 is brighter than Circuit // Bulb P in Circuit less brighter or dimmer than Circuit 2. Able to give one reason for the answer in (c)(i). Bulb P in Circuit 2 is arranged in parallel so it receives (more current) / (higher voltage) or Bulb P in Circuit is arranged in series so it receives (less current) / (less voltage ) *Note: Bulb P in Circuit 2 is arranged in parallel. Wrong! (accept: Bulb P in circuit 2 receives more current/higher voltage) Total 8

No. Marking Scheme Marks Total 7 (a) Able to state the support system J : Thorn K : Tendril L : Thorn M : Twinning stem 4 (b) Able to classify Sample answer. J, K, L, M with thorn without thorn 2 J, L K, M 2 4 2. J, K, L, M With tendril without tendril K J, L, M

2 3 J, K, L, M With twinning stem Without twinning stem M J, K, L (c)(i) Able to state the condition of aquatic plant Plant in situation B stands upright but plant in situation A cannot stand upright (ii) Able to state the inference The plant stands upright because of water buoyancy Total 0

3 No. Marking Scheme Sub Marks 8(a) Able to make inference based on diagram 8.. Sample In the presence of light, the water weed carries out photosynthesis. Total 2 In the presence of light, the water weed releases oxygen. 3 Water weed needs light to carry out photosynthesis. 4 During photosynthesis, oxygen is released. [Accept any reasonable answer] (b) Able to record the volume of oxygen. (i) Distance = 20 cm ; Volume = 0.4 cm 3 (ii) Distance = 30 cm ; Volume = 0.2 cm 3 (iii) Able to draw a line graph + 2 Note: 3 correct points - mark Straight line - mark

4 (c) Able to state the relationship between volume of oxygen and distance of bulb. The farther the distance, the lesser the volume // The closer the bulb, the higher the volume // Indirectly proportional. (d) Able to state the responding variable; The rate of photosynthesis // The volume of oxygen (e) (f) (g) Able to state one constant variable. Type of bulb/lamp or Type/size of the plant. or the size of the gas jar. Able to predict based on the graph drawn. 0.3 cm 3 (the value same as shown in the graph. Not by calculation.) Able to give definition based on the question. (Not from students knowledge). Sample The rate of photosynthesis refers to the volume of oxygen released. 2 Amount of oxygen collected. 3 The volume of oxygen collected at different light intensity (Any reasonable answers) 0