(1) PRACTICE TASK 2 MATHEMATICS SS3

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1 (1) PRACTICE TASK 2 MATHEMATICS SS3

2 (2) 3. a. Factorise 25m n 2 2 4( m 2 ). 2 2m m 15 b. Simplify the expression 2 m 9 simplified expression is not defined. and state the value of m for which the c. Solve the equation 3 2 m 2 2m a. P is the point (60 0 N, 18 0 E) on the earth s surface. Q is the point due west of P such that the distance PQ measured along the parallel of latitude is 550km. Calculate the longitude of Q correct to the nearest degree. (Take the radius of the earth as 6400km and π=22/7).

3 b. Using a ruler and a pair of compasses only, construct a parallelogram PQRS such that PQ 8cm, RQ 7cm and 0 RQP 105. Week Three CIVIC EDUCATION SS THREE Civil society and popular participation Meaning of civil society. Functions and need for civil society. Principles of civil society. Qualities of civil society. Assignment: (1) Discuss the meaning of civil society. (2) Outline seven functions of civil society in a democratic system of government. (3) How can the civil society solve the problem of mass failure of senior secondary school students in External examination in Nigeria? Week Four Democracy Meaning of democracy Importance of democracy Problems of democracy Process of democracy Assignment: (1) According to Abraham Lincoln, what is democracy? (2) Outline seven roles of judiciary in the survival of democracy in Nigeria.

4 (3) Highlight five problems of democracy in Nigeria. (4) Write in support or against this statement democracy is the best form of government in Nigeria. BIOLOGY 1. State four differences between reflex and voluntary actions. Reflex actions Voluntary actions Draw a labeled diagram, 8 to 12 cm long, of the longitudinal section of the human eye.

5 3. Describe the structure of the retina. 4. Name the chemical components of tears. i. ii. iii. iv.

6 5. List four major parts of the mammalian ear and state the function of each. i..... ii. iii. iv. 6. What are receptors?. 7. Name the receptors found in the mammalian skin and the stimuli they detect. Receptors Stimulus detected i. ii. iii. iv. v. 8. Define accommodation. 9. Describe the following eye defects. Myopia

7 . Hypermetropia Astigmatism Conjunctivitis 10. State five ways of caring for the eye. i ii. iii. iv. v...

8 FOOD & NUTRITION ASSIGNMENT. Read the following topics in your Textbooks and then answer the following questions. 1. Human nutrition-(a) Importance of human nutrition. (b) Factors affecting food nutrition. 2. Scientific Study of food-test for different type of food. 3. Kitchen Plans. 4. Cereal Grains-Processing, uses and choice of cereal grains. Questions. 1.(a) (b) (c) 2.(a) (b) (c). Define Nutrition. List three factors that affect human good nutrition. In a tabular form, give three differences between marasmus and kwashiorkor. List three measuring equipment in the kitchen. State two importance of accurate measurement in weighing foodstuffs. List two reagents used for testing each of the following food. (1)Protein (11) carbohydrates (111) fats. 3(a). (b) 4(a) (b) Sketch a kitchen layout showing the position of the sink, refrigerator and cooker. List six equipment that are required to prepare meat pie. What is composite flour? Enumerate six Nigerian dishes made from corn. GEOGRAPHY SSS 3. WEEK 1& 2- The Economic Community of West African States (ECOWAS) - Introduction - Objectives (Reasons for setting up the organization ) - Achievements of the organization so far - Problems facing the organization and suggested solutions to the problems WEEK 3 & 4- Definition of Ecological system (Ecosystem) - Description of components of Ecosystem - Interdependent within the Ecosystem components Biotic and Abiotic - Description Hydrological Cycle and Nitrogen, Food chain

9 - How man interferes with Ecosystem and the result Reference Book: 1. Senior Secondary Geography by S. A. Emielu. Questions : 1a. Outline any 4 objectives of ECOWAS (b). State any 5 achievements since its formation (c) State any 5 problems that have limited the achievements of the objectives. 2a. Define Ecosystem (b). Name 4 components of the ecosystem (c) Write short notes on (i) Food chain (ii) Hydrological cycle (iii) Nitrogen cycle (iv) Carbon cycle. (d) Discuss 4 in which man has interfered with his natural environment.

10 CHEMISTRY

14 PHYSICS ALTERNATIVE TO PRACTICAL Answer all questions 1.A student is determining the position of the centre of mass of an object using a balancing method.fig. 1.1 shows the apparatus used. A load of mass x is taped to the metre rule so that one side of the base is exactly on the 75.0 cm mark. The student places a mass m of 30 g on the rule and adjusts its position so that the rule is as near as possible to being balanced with the 50.0 cm mark exactly over the pivot, as shown in Fig The student records the distance d from the centre of the 30 g mass to the 50.0 cm mark on the rule. He then repeats the procedure using different masses. The readings are shown in Table 1.1. (a) For each value of d, calculate 1/d and enter the values in the table. [2] (b) Plot a graph of m / g (y-axis) against 1/d 1/cm (x-axis).

[4] (c) Determine the gradient G of the graph. Show clearly on the graph how you obtained the necessary information. G =... [2] (d) Determine the horizontal distance z from the 75.

15 [4] (c) Determine the gradient G of the graph. Show clearly on the graph how you obtained the necessary information. G =... [2] (d) Determine the horizontal distance z from the 75.0 cm mark on the rule to the centre of mass of the load using the equation, where k = 1250 g cm and x = 50 g. z =...[1] 2.The TAICO science class is investigating the reflection of light by a mirror as seen through a transparent block. Fig. 2.1 shows a student s ray-trace sheet.

16 Fig 2.1 (a) A student draws the outline of the transparent block ABCD on the ray-trace sheet. He draws the normal NN' to side CD. He draws the incident ray EF at an angle of incidence i = 20. He pushes two pins P1 and P2 into line EF and places the block on the sheet of paper. He then observes the images of P1 and P2 through side CD of the block from the direction indicated by the eye in Fig. 2.1 so that the images of P1 and P2 appear one behind the other. He pushes two pins P3 and P4 into the surface, between his eye and the block, so that P3, P4 and the images of P1 and P2, seen through the block, appear in line. (The plane mirror along side AB of the block reflects the light.) The positions of P3 and P4 are marked on Fig (i) On line EF, mark with neat crosses (x) suitable positions for the pins P1 and P2. (ii) Continue the line EF so that it crosses CD and extends as far as side AB. (iii) Draw a line joining the positions of P4 and P3. Continue the line so that it crosses CD and extends as far as side AB. Label the point G where this line crosses the line from P1 and P2. (iv) Measure the acute angle θ between the lines meeting at G. θ =...[1]

17 (v) Calculate the difference (θ 2i ). (θ 2i ) =... [1] (b) The student repeats the procedure using an angle of incidence i = 30 and records the value of θ as 62. (i) Calculate the difference (θ 2i). (θ 2i ) =...[1] (ii) Theory suggests that θ = 2i. State whether the results support the theory and justify your answer by reference to the results. statement... justification [2] (c) To place the pins as accurately as possible, the student views the bases of the pins. Explain briefly why viewing the bases of the pins, rather than the tops of the pins, improves the accuracy of the experiment [1]. A diode is an electrical device that lets current pass through it in one direction only. The circuit symbol for a diode is shown in Fig Fig. 3.1 arrow shows the direction of the conventional current I when the diode is conducting. The

18 (a) Complete Fig. 3.1 to show a series circuit that includes (i) a 1.5 V power supply of fixed voltage, connected so that the diode is conducting, (ii) an ammeter to measure the diode current I, (iii) a switch, (iv) a lamp, rated at 1.25 V, 0.25 A, in series with the diode and the power supply. [3] (b) On Fig. 3.1, mark with a + sign the positive terminals of the power supply and the ammeter. [1] (c) What would happen if the diode is connected the other way round?......[1] (d) Why is it necessary to include a lamp in this circuit?......[1] 4.Fig. 4.1 shows a block of aluminium of mass 1 kg used to measure the specific heat capacity of aluminium.

19 A heater fits into a hole in the centre of the block and a thermometer fits into a second hole. Fig. 4.2 is the circuit containing the heater. When the switch is closed, the meters show steady readings of 11.6 V and 4.7 A. (a) Fig. 4.3 shows the scales of the two meters. Fig 4.3 On Fig. 4.3, draw pointers to show the readings on the meters after the switch has been closed. [2] (b) When the heater is switched on, the block warms up and some heat is lost to the surroundings.state two ways of reducing this heat loss [2] (c) The thermometer is used to measure the initial and the final temperatures of the block. The initial temperature of the block is taken before the heater is switched on. Explain why the final temperature of the block is taken a short time after the heater is switched off [1] (d) The heater is switched on for four minutes and the temperature rise of the block is 15 C. Suggest a reason why the heater is not switched on for a very much longer time [1] A TAICO student is determining the focal length of a lens. Fig. 5.1 shows the experimental set-up. The student positions the illuminated object and the lens and then moves the screen away from the lens until a sharply focused image of the object is formed on the screen.

20 Fig 5.1 (a) Using your rule, measure on Fig. 5.1 the distance u, in cm, from the centre of the lens to the illuminated object and the distance v from the centre of the lens to the screen. u =... v =... [2] (b) (i) Fig. 5.1 is drawn one fifth actual size. Calculate the actual distance x from the illuminated object to the centre of the lens and the actual distance y from the centre of the lens to the screen. Record these values in Table 5.1. The first pair of readings obtained by the student has already been entered in the table. (ii) Calculate for both pairs of readings the focal length f of the lens using the equation [4] Record the values of f in Table 5.1. (c) Calculate the average value of the focal length. average value for the focal length =... [2] (d) State two precautions you would take in the laboratory in order to obtain reliable measurements [2]

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *6752477947* PHYSICS 0625/06 Paper 6 Alternative to Practical May/June 2009 Candidates answer