Jawapan. Science. Kertas 1. Soalan Ulangkaji SPM SOALAN ULANGKAJI SPM 2008

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SOLN ULNGKJI SPM 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29.

1 SOLN ULNGKJI SPM Science [ 1511/1 ] [ 1511/2 ] Kertas 1

recorded in Table 1 Time / minute 0 5 10 15 20 25 Temperature / 60 70 80 80 80 90 (a) ased on Table 1, draw a graph of temperature

2 SOLN ULNGKJI SPM [ 1511/1 ] [ 1511/2 ] Science Kertas 2 1 utiran 1. Figure 1 shows an experiment to study the melting point of substance X Thermometer Substance X Figure 1 The result of the experiment are recorded in Table 1 Time / minute Temperature / (a) ased on Table 1, draw a graph of temperature against time Temperature / o (N) 100 Melting point Time / minute ased on the graph in (a), determine the melting point of substance X. Mark the melting point of substance X on the graph

3 [ 1511/1 ] [ 1511/2 ] Science SOLN ULNGKJI SPM Kertas 2 utiran Temperature of substance X is directly proportional to the time taken for heating substance X // the higher the temperature, the higher the time taken for heating substance X 2.(a) 3.(a) Temperature Metal P,Q and R released/produced gas bubbles // Metal P released a lot of air bubbles than that metal Q and R Metal P is more reactive than Metal Q and R because it released a lot of air bubbles Type of metal Metal P Magnesium Metal Q luminium Metal R Iron Nail Object P F 2F 2F 0.8 ± 0.1 Inverted // diminished // real amera Note : minus eyes F Ray diagram at least with one arrow, -1 orrect image, image inverted-1 Note minus ray diagram with dotted line 4(a) Type of weight // mass of weight // height of weight rass is harder than copper because the dent on the copper block is deeper 1.5 ± 0.1 opper and zinc Note : oth must correct (e) 5(a) opper block is block that produce deeper depth of the dent when weight are dropped on it R: cerebellum, O : Spinal ord *ontrols memory // thinking // all voluntary actions *ontrols memory // thinking // all voluntary actions

4 SOLN ULNGKJI SPM SPM Sitting reathing Sneezing alancing Reading utiran 6(a) hromosomes mutation own s Syndrome st pair of chromosome (e) (f) 7(a) (e) Small hands with short fingers // big tongue which hangs out // almond shapes eyes male distillation To ensure that the condenser is always filled with water To break up the air bubbles // prevent bumping in the water oiling and condensation *Pure ethanol 8(a) 9(a) (i) (ii) P: lpha Q: eta R: Gamma Gamma ray Phosphorus -32 and arbon -14 L: Glass Wool K: Potassium Manganate(VII) Release /produce oxygen gas when heated P Q P,R,Q

5 SOLN ULNGKJI SPM 10(a) utiran Suggest a suitable hypothesis for this scientific investigation primary filter allows only its own colour to pass through it Using red filter, blue filter, green filter and other apparatus, describe an experiment based on the following criteria im of the experiment To investigate the action of primary coloured filters on white light Identifying the variables Manipulated : Primary coloured filters onstant : White screen Responding : olour of light transmit / produce on the screen List of apparatus and materials *Red filter, blue filter, green filter, ray box and white screen Procedure P1- rrange ray box, blue filter and white screen or diagram -1 P2 - Switch on the ray box 1 P3 Observe and record the colour light transmitted on the screen -1 P4 Repeat the experiment using red and green filter -1 Tabulation of data Type of filter olours Transmitted Red Green lue

6 SOLN ULNGKJI SPM SPM 11(a) Physical hange No new substance are formed Involved very little heat change The change is reversible The substance keep their original mass luminium utiran hemical hange New substance are formed Energy is absorbed or released The change is irreversible The original substance changes its mass Iron Metal Tin opper Study the above figure. Explain how you would develop concept based on the information in Figure 11 Your answer should be based on the following steps: Identify two common characteristics P1 Shiny and lustrous P2 - Good conductor of electricity / heat P3 High boiling / melting point P4 Strong P5 can be beaten and pulled evelop initial concept ny two points above are metal Eg : Good conductor of electricity and strong are metal* Give other example and non-example in relation to the concept Other example : lead // zinc // gold Non-example : sulphur // chlorine // bromine // iodine Explain the actual concept Metal are substance that any two points Eg : *Metal are substance that are good conductor of electricity and strong

7 SOLN ULNGKJI SPM 12(a) utiran State three purposes of alloying and give one example of alloy P1 lloys are stronger P2 lloys give a better shiny and beautiful appearance P3 lloys can withstand corrosion Eg : rass // bronze //duralumin // steel // pewter Sungai Pasir Industrial Park is becoming heavily polluted with toxic gases released by factories. fter several years, acid rain takes place at the industrial park.you as an environment officer have been asked to explain to the factories manager how to overcome this problem Your answer should include the following: Identify the problem Sungai Pasir ndustrial Park become polluted with toxic gases released by the factories larification of the problem cid rain takes place at Sungai Pasir Industrial Park Solving methods P1 Electrostatic precipitator can be fitted to the factory chimneys P2 Tall chimneys can be built to direct smoke high into the air P3 Toxic gases should be treated before they are releases into the air hoose the best method and explain your choice Electrostatic precipitator fitted at the chimneys will attract large waste particles such as carbon

The table shows the students suggestions about the identity of P.

1 Three students, X, Y and Z, were told that solid P reacts with dilute acids and also conducts electricity. The table shows the students suggestions about the identity of P. Which of the students are