SPSS Sec 2 Science 2014 EOY

NAME CLASS INDEX NO. Parent’s / Guardian’s Signature: ___________________ Date: ___________ ST. PATRICK'S SCHOOL END-OF-YEAR EXAMINATIONS 2014 SUBJECT : GENERAL SCIENCE DATE : 8 October 2014 LEVEL : SECONDARY 2 EXPRESS DURATION: :2 HOURS INSTRUCTIONS TO CANDIDATES DO NOT OPEN THIS BOOKLET UNTIL YOU ARE TOLD TO DO SO. 1. Write your name, class and index number on the Question Paper and the Optical Answer Sheet in the spaces provided. It is also required that you WRITE and SHADE your index number on the Optical Answer Sheet. 2. This paper consists of Three (3) Sections : Section A, Section B and Section C. 3. Answer ALL questions in Section A on the Optical Answer Sheet provided. 4. Answer ALL questions in Section B in the spaces provided. 5. Answer ANY THREE FULL questions out of 4 in Section C on the writing paper provided. Start each question on a new sheet of paper. 6. Calculators may be used where necessary. Give answers to Three (3) significant figures . 7. DO NOT DETACH any sections from this paper. 8. At the end of the examination, arrange your answers to Section C in order and tie with the string provided. 9. Submit the Optical Answer Sheet , this paper and answers to Section C SEPARATELY . INFORMATION FOR CANDIDATES: The number of marks is given in brackets [ ] at the end of each question. For Examiner’s Use Only Section A (30 m) B (40 m) C (30 m ) Total (100 m) Grade Target Grade Score This question paper consists of 26 printed pages. A copy of the Periodic Table is printed on page 26.

2 SECTION A: [30 marks] Each question is provided with four possible answers (A, B, C and D). Select the most appropriate answer and shade your choice on the Optical Answer Sheet provided. 1 The diagram shows the third period of the Periodic Table. Moving from left to right across the period, the elements __________________. A become more acidic B become more dense C change from metal to non-metal D change from gas to liquid to solid 2 The table shows the number and the type of atoms in one molecule of different substance. Chemical formula Number of atoms Type of atoms I CF4 5 2 II HBr 2 2 III H2SO4 7 3 IV S8 1 8 Which of the following is NOT correct? A IV only B II and III only C I,II and III only D I,II, III and IV

3 3 The diagram shows only the protons and electrons in an atom o f Boron. The neutrons are not shown. With the help of the Periodic Table, how many neutrons are there in the nucleus of this atom? A 5 B 6 C 10 D 11 4 Which of the following can interact with matter to bring about a chemical change? I energy II magnetism III matter A I only B II only C I and III only D I, II and III 5 Indigestion tablets are used to neutralize the gastric juice in our stomach if we have indigestion. Which one of the following is a possible ingredient found in indigestion tablets? A Hydrochloric acid B Magnesium hydroxide C Nitric acid D Sodium chloride

4 6 The diagram shows a magnesium block added into dilute acid. Which of the following statement(s) about this diagram is/are correct? I If hydrochloric acid is used, one of the compounds in the solution is magnesium sulfate. II The bubbles of gas would produce a ‘pop’ sound when a lighted splint is used to test its presence. III The mixing of substances leads to formation of new substances. IV When excess magnesium block remains in the solution, the pH value of the solution will be 7. A I B II C II, III and IV D I, II and III 7 The diagram shows white sodium carbonate being heated until no more change is seen. The solid left in the test tube is black and the gas released turns limewater chalky. Which one of the following statements is true about this experiment? A The experiment shows a combustion reaction. B The experiment shows a combination reaction. C The experiment shows the electrolysis of a substance. D The experiment shows a thermal decomposition reaction. limewaterSodium   carbonate

5 8 Which one of the following occurs when white light passes through a prism? 9 The diagram shows rays of light passing through an object X. What could be X? A A diverging lens B A converging lens C A glass block D A plane mirror 10 Two beams of coloured light, Z and green were mixed as shown. What could the coloured light Z be? A blue B red C magenta D yellow     white green Z

6 11 The diagram shows an inverted flask containing air. A tube is placed into the flask and then placed in a beaker of water as shown. What will be observed if ice is placed in contact with the bottom of the inverted flask? A Bubbles will be formed in the water. B Nothing will be observed. C The water level in the tube will drop. D The water level in the tube will rise. 12 Two cars, one painted dull black and the other a shiny white, were left in the sun. When the two cars had reached the same temperature they were driven into the shade. In sunlight In the shade When in the sun, which car was heated up faster? And when in the shade, which car would cool down faster? In the sun In the shade A White car heated up faster. White car cooled down faster. B White car heated up faster. Black car cooled down faster. C Black car heated up faster. White car cooled down faster. D Black car heated up faster. Black car cooled down faster.

7 13 Which one of the following best represents the convection currents formed when a liquid in a container is being heated? 14 A bridge above a road is made up of three concrete sections. The middle section rests on two supporting sections but gaps are left on both sides. What is the main reason for leaving gaps between each concrete section? A to make the bridge wider B to allow room for expansion C to let rain water seep through D to slow down traffic on the bridge 15 Which one of the following statement is incorrect? A Loudness of sound is measured in decibel. B Sound waves cannot travel through a solid. C Sound is characterized by properties of a wave. D Sound requires a medium to be transmitted. 16 What is the approximate range of audible frequencies for a young person? A 1 Hz to 2 kHz B 20 Hz to 20 kHz C 20 kHz to 200 kHz D 1000 kHz to 20 000 kHz A B C D

8 17 The diagram shows an experimental set-up of an electric circuit. What would happen to the electric circuit when a conducting wire is connected between points X and Y? A The brightness of the bulb and the reading of the ammeter remain the same. B The brightness of the bulb decreases but the reading of the ammeter is lesser than 3 A but greater than 0A. C The brightness of the bulb decreases but the reading of the ammeter is more than 3A. D There is no brightness for the bulb and the reading of the ammeter becomes zero. 18 The diagram shows the arrangement of five ammeters, P to T in an electric circuit. The circuit contains five identical light bulbs. Which of the following ammeters show the same ammeter readings? A Q and T B P and R C R and S D P and S

9 19 Which diagram shows possible currents at a junction in an electrical circuit? A B C D 20 Which circuit shows the correct positions for the fuse and switch in the electric heater? 21 The diagram shows an electric switch. This type of switch should not be used in a washroom where there is a lot of moisture on the hand. What is the main reason for this? A The metal parts might rust. B The moisture might stop the switch working. C Soapy water might make the plastic slippery. D The switch might give an electric shock when used. Metal screw Plastic case

10 22 Look at the experimental set-up. Which membrane(s) is/are partially permeable? A Membrane A only B Membrane B only C Membranes A and B D None of the membranes Refer to diagram for question 23