Candidate Number Candidate Name Lee Pe % ©. EXAMINATIONS COUNCIL OF ZAMBIA + |» Alolnt Examination for the Schoo! Certificate» “Sand General Certificate of Education ‘Ordiniary Level LL en ee alow"cal giao ime: 1 hour15 minutess Bates INSTRUCTIONS TO CANDIDATES Write your name, centre number and candidate number at the top of this page and on any separate answer paper used. There are twelve (12) questions in this paper. Section A Answer all the questions. \Write your answers in the spaces provided on the question paper. Section B Answer any two questions. Write your answers on the answer paper provided. At the end of the examination 1. Fasten Answer Booklet used securely to the question paper. Candidate's | Examiner's | 2. Enter the numbers of the Section B questions you have a answered in the grid below. INFORMATION FOR CANDIDATES ‘The number of marks is given in brackets [_] at the end of each question or part question. Cell phones are not allowed in the Examination room. secen010F« This paper consists of 11 printed pages. [Turn overPage 2 of 11 Section A [45 marks] Answer all questions. Write your answers in the spaces provided on the question paper. 1 Figure 1.1 shows part of a micrometer screw gauge, an instrument used to measure a physical quantity. Figure 1.1 (a) Whatis the reading shown on the micrometer? ee ld (b) What physical quantity is measured by the instrument? | (c) What is the function of the ratchet? ee Ld Total: [3] SelencelSt24/2 2/2010Page 3 of 11 2 Figure 2.1 shows a simple pendulum that oscillates between position A and C. It takes 2.05 seconds to go from A to C and back to mid-point B. Figure 2.4 (a) (i) Calculate the period of a pendulum. i) Calculate the frequency of the pendulum. (2) {2 (b) Briefly describe how the period of a pendulum would be measured. (1) Total: [5] 3° (a) Figure 3.1 shows a uniform metre rule of mass 120g suspended at its mid-point from a spring balance, which is calibrated in Newtons(N), 200m Spring balance 60.cm 100m Stone 500m 1009 Figure 3.4 Selencels124/2/212010 [Turn overPage 4 of 11 A stone, suspended at the 20cm mark, is balanced by a 100g mass suspended on the 60cm mark. Assume g = 10m/s”. {a) Calculate the mass of the stone 2) (b) Why does the mass of the metre rule play no part in the calculation in (a)? [1] (c)_Whatis the reading on the spring balance? 2] Total: [5] 4 Figure 4.1 represents a thick-walled bottle used to carry out an experiment to determine the density of air. The bottle was fitted with a rubber bung and a tap. Rubber bung Figure 4.1 The following results were obtained: Mass of the bottle containing air =410g Mass of empty (evacuated) bottle = 409g Mass of bottle filled with water = 11509 ‘Scienools1242 22010Page 5 of 11 (a) What mass of water was needed to fill the bottle? a] {b) What was the internal volume of the bottle? Take the density of water as 1glem®. fl (c)_ What mass of air filled the bottle? 1) (4) What was the density of air? 2 Total: [6] 5 Figure 5.1 shows the path taken by a ball thrown vertically up into the air. £O BO) AO D Figure 5.1 (a) (i) State at which position A, B, C or D the ball travels fastest. (1) (ii) Explain your answer in (i) (1) Scioncelst24/2/22010 [Turn overPage 6 of 11 (b) Wind is a renewable source of energy. The windmill is used for electrical generation and to pump water. (i) What is meant by renewable source of energy? (1) (ii) State one disadvantage of depending on wind energy. a (iil) Give an example of a non-renewable source of energy 7 (1) Total: [5] 6 (a) Figure 6.1 shows a cooler box used to keep food cool. id made of polythene (Bs xpanded polystyrene THA, A |< outer cover made of polythene 7 Expanded pstyene Inner ring made of polsthene and painted white Figure 6.1 Describe how the cooler box keeps food cool for a long period Oe a rr———“ eC CL“ ‘Scienools1242 22010Page 7 of 11 (b) With the aid of a labeled diagram describe an experiment to determine the lower fixed point of a thermometer. (4) Total: [6] 7 Figure 7.1 shows some of the components of the electromagnetic spectrum. Radio waves Microwaves [ Infra-red Visible light [A Xray | Gramma-rays l _ (a) What component is represented by A? a) (b) State the speed of the following components in a vacuum. (i infra-red mis 1] (i) gamma rays mis rol (c) All electromagnetic waves are transverse. (i) What is the meaning of the tarm “transverse”? m (ii) Give another example of a transverse wave, but which is not an electromagnetic wave. 1) Total: [5] Sciencels124/272/2010 [Turn overPage 8 of 11 8 Four rods of identical dimensions but made of different materials are painted white. Two of the rods are magnets, one is made of iron and the remaning one is made of copper. How would you determine the identify of each rod using only the provided loads. (4) Total: [4] 9 Figure 9.1 shows a cathode ray oscilloscope (CRO) Heater (#0038) oe ¥ Xoplees (cathode) (control gd Lamad i Figure 9.1 (a) Name the process by which electrons are produced in the CRO. (1) (b) Why is the potential difference between the cathode and anode made very high? a) ti (ce) Describe the use of (i) the Y-plates nl (ii) the X-plates 1] (a) Explain why the CRO should be evacuated. a) Total: [6] Sciencels124/2 2/2010Page 9 of 11 Section B [20 marks] Answer any two (2) questions from this section. Use the Answer Booklet provided. 10 Figure 10.1 shows an arrangement for demonstrating the relationship between force and acceleration Trolley of constant large mass Bench In one particular experiment, the mass of the trolley was kept constant. The time t for the trolley to move a distance of 1.00m from rest was determined for various values of the pulling force F. The acceleration a was then calculated using the equation where S = 1.00m. The following various were obtained. FIN 0.40 080 | 1.20 | 1.60 2.00 al(m/s*) [9.08 0.22 0.43 [087 ora | (a) Plot a graph of F against @ 5] (b) (i) Determine the slope/gradient of your graph. 2] (ii) What physical quantity does the gradient represent? tl {c)_ In this experiment explain why a pulling force is needed to give zero acceleration [2] Total: [10] Scloncels124/272/2010 [Turn overPage 10 of 11 44 (a) Describe an experiment you would perform to demonstrate that water is a poor conductor of heat. (4) {b) Figure 11.1 shows, the essential features of a solar heating panel. A small electric pump circulates a liquid through the pipes. Glass ¢y<—Metal pate painted black ‘Small air space er pipe painted black Copper pipe painted biack Mineral fibre Figure 11.1 ‘State why, ())_ the pipes and back plate are blackened re (ii) there is a mineral fibre backing to the panel (2) (iii) the glass sheet increases the energy collected by the panel by a large factor.{2] Total: [10] Science/6124/2 2/2010Page 11 of f1 12 (a) Figure 12.1 shows an incomplete circuit for an experiment to investigate how the resistance of a torch bulb varies with current flowing through it Bulb ©) me Figure 12.1 (i) Draw the circuit diagram and add to it an ammeter to measure the current through the bulb and voltmeter for measuring the potential difference (pd) across the bulb. ie) (ii) State clearly how you would obtain the readings needed to carry out the investigation. (2) How would you determine the resistance of the bulb? ira} (b) (i) If the bulb is 2.5v and takes the current of 0.25A at its working temperature, calculate the resistance of the bulb. 2] (li) The resistance of the bulb when the filament is cold is 52. Sketch the graph you would expect to obtain if you plot resistance against current for the bulb.(2] Total: [10] ‘Seloncels1242/22010 [Turn overECZ PAST PAPERS. HAIN aU AD) AW a0 NSH Ah SY G0 TO: WWW.ZEDPASTPAPERS.COM