RI Y2 LOWER SECONDARY SCIENCE EOY 2016

NAME: CLASS: NO: ~-------- ____ J_ __ --1----- RAFFLES INSTITUTION 2016 END OF YEAR EXAMINATION Subject Level Date Time SCIENCE YEAR2 13 Oct 2016 (Thursday) 0800 - 0945 (1 h 45 min) INSTRUCTIONS 1. Do not turn over the page until you are told to do so. FOR EXAMINER'S USE 2. Write your name, index number and class in the spaces at the top of this page, the top of each section and on the OT AS sheet. 3. Read all instructions and questions carefully. 4. This paper consists of FOUR SECTIONS. • Section A Answer all questions on the OTAS sheet. • Sections B, C, and D. Answer all questions in the spaces provided. Bonus questions (marked with *) are optional. ~- All working must be shown. 7• The ~se of a calculator is allowed. . . • Candidates are reminded that all quant1tat1ve answers should include appropriate units and should be given a sensible number of significant figures. Errors in units and 8 numbers of significant figures will be penalized. • After the examination, please hand in the following ~aratel~ to your invigilator: • OTAs sheet • s , Sections A and 8 booklet , ection C booklet Section D booklet Section Marks A B C D T9tal /~5 ~ OUE:'cs:";r~,o~N-:--:P::-A-:-:P-:-E::-:R::-C-::-0-::-:-:-N:::-Sl:-:::S:::T:::-S--:O:-::F:-:2~2--:P:-::R:-:-:I N~T=-E=-0---PA_G_E 5 EXCLUDING THE COVER PAGE. 109 _,./~

; ,;' ,.,. /·'---·.•.'·-'• •rt•· f}tjf/p/; 0~-,/;•:f/p'·',./;,,,,Y, .. :rl.1{17-f!:;)j("'-'i~'-1 .,r-/1."•"· ,,y,,,,1-., .,7,. •-:·1/jpt.,,., '· j.,1, 1 ,,;J/fY;,.,~1,,,1/4.')!'/.'./, Section A (25 markfil Answer ALL Questions Four possible answers A, B, C and D are given ti . nswer and record it on the OT As answer sheet or ~dach question. a p • d' T bl . . prov, ed Choose the most appropriate A COPY of the eno Ic , a e 1s given on Page 10_ • Which statement is true for a nitride ion? A B C D It has an equal number of protons and electrons. It has more protons than electrons. It has the same charge as a fluoride ion. It has the same number of electrons as a neon atom. Element Y forms a covalent compound with fluorine with the formula Yf3. Which Group of the periodic table could Y be in? A B C D Group I Group II Group V Group VII What is a property of ammonia? A B C D It conducts electricity in aqueous state. It has a giant lattice structure. It is a liquid at room temperature and pressure. It turns moist blue litmus paper red. t form effervescence? Which pair of substances react 0 - substance 2 substance 1 sulfuric acid -A copper ammonia -~B hydrochloric acid water - ~ sodium - - nitric acid -D zinc chloride -~ . A person looks into the mirrors . two mirrors. . t O viewed using The diagram shows an obJeC f Q? • age o • as shown. Where is the 1m 111 --- .. -,-r, -:---;:,, ,.., .. : ! 'I • .' l 1 :-~·"•~:.:.t.~·: . /4 ~~ :!?~:-\) : -,/' ,( 'lf:;1t/:j:~ l:1 '<i/ .. ::. ,, IIIJill! ,,.y///:-'· /i/ • i-:?lflx.r:\_,r': .. J: t: i✓ -1,·1,. ,W ;, ·, ,; '11/1 /'j,' ,-£/, ,,, ,/'; /l/j I , /, I,, r.' ~~ 1,1.//,111 1 I ;~ , ;i 1' '/,/t<:: /:': +, '\ " , /,, 1/ i,,;,: 1,rX ,, /1' 1 u·1 1 ': ,.;f !' : .; ~ •,rr.J, './!\1,· •'.,, ,, !,1/.1,, f,-( 1'-'''•!' ·~ I~; ,·. i,'/ // ✓. ,/1 . / /[?; 1, ;,j,' '·d : ?'~::;11?.-ii I'/ 11li1/, ~~11 1 l'J'f/ .~ff~~ :'.'< ,1 i. f\;; '( ,,' I 1 ; I ·-. ' ,~h I. ,, 1:r' ' I ;~ ._kt·, __ )/ •• -p-~)j/, .· ,-_

6 An eye views an object O by reflection in a plane mirror. Which is the correct ray diagram? A B C D 7 The diagram shows a ray of light moving from diamond to air. diamond air What is the critical angle of diamond? A 21° B 27° C 63° D 65° 2 112

IO A ray of light is incident on one side of a rectangular glass block Its path is plotted through the block and out through another side. • Which path is not possible? A D The diagram shows the action of a magnifying glass. Which point is the principal focus (focal point) of the lens? object A B ~en _an object is placed 40 cm from a thin converging lens, a real image of equal size to fo~ 0~Ject is formed. The object is then moved 10 cm towards the lens. Which of the owing describes the new image formed? e distance from lens ima e size less than 40 cm diminished less than 40 cm ma nified more than 40 cm diminished more than 40 cm ma nified 3 113 ,__

~ 11 What will happen to the brightness of the lamps P and Q if the resistance of the rheostat. . ~ increased? _ ___....t---~1------, p Q lampP lampQ A brighter brighter B briohter dimmer C dimmer brighter D dimmer dimmer 12 Two of the wires P, Q, R and S in Setup A are to be connected to the points X and Yin Setup 8 to form a complete circuit. Which two wires, when connected to points X and Y, will give the highest ammeter reading A P and Q B P and S C Q and R D Rand S 114 a s Setup A 4 Ammeter A X y Setup B ..,.,

An electric kettle uses 12 kWh after 3 hours of operation. If the cost of energy consumption is 4 cents per kWh, what are the power consumed and the cost payable? power/ kW cost I cents A 4 48 B 4 144 C 36 48 D 36 144 The diagram shows four fuses, J, K, L, and M, in a circuit with three resistors. When the switch is closed, which two fuses will be blown? J (13 A) I 12 V I A J and K only B J and M only C Kand L only D Land M only K(10A) L (5A) 20 30 M (1 A) 60 The diagram shows the three wires of an electrical supply connected to a rice cooker. electrical blue wire rice supply cooker brown wire 200V 25 0 yellow and green wire ~ tha~ are the currents flowing through the wires when the rice cooker is switched on and nctioning properly? r---._ ~.__ blue wire brown wire vellow and green wire re--~ OA BA OA rt--- BA OA OA ro--r--_ BA BA OA "------- BA BA BA 5 115

16 The diagram shows a section of the stem. What is the function of cell X? A Cell X matures into other vascular tissues. B Cell X transports glucose and amino acids. C Cell X produces energy for another cell to perform a function. D Cell X transports water and dissolved mineral salts. 17 The diagram shows the sections of a root and a stem of a plant. 1 / 2 section of root section of stem Where are the xylem and phloem located? xylem phloem A 1 & 3 2&4 8 1&4 2&3 C 2&3 1&4 D 2&4 1 & 3 6

18 The diagram shows three plant root cells (W, X, Y) and the soil solution (2). Which statement is correct? A The water potential of the water found in soil Z is zero. B The water potential of cell sap in Xis lower than cell W. C The water potential of cell sap in X is higher than cell Y. D The water potential of cell sap in W is the lowest of the three cells. 19 Which of the following statement(s) describe why transpiration is useful for the plants? 1 Transpiration cools the plant down by removing latent heat of vaporisation. 2 Transpiration allows excess water to escape so that plant cells will not burst. 3 Transpiration helps to transport dissolved mineral salts and water up the plant. A 1 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3 W Where is the manufactured food made by leaf X likely be translocated to? A B C D 1 and 2 only 3 and 4 only 2, 3 and 4 only 1, 2, 3 and 4 7 117

21 I l' ;\ , , ! , ·1 i' t d part of the urinary system. During the The diagram shows the male reproductive sxs em an · found in? ejaculatory process, where 1s semen • B C 22 The diagram shows the female reproductive system. X y w z Which level of organisation are the structures W, X, Y and Z? cell tissue I organ 1 organ syste A w y X z B X z y w C y X z w D z w I y I X 23 Which statement is true about a woman's ferti\e period? 118 A B C D Her fertile period starts a few days before ovulation as sperms are able to survi\J a few days. Her fertile period starts a few days before ovulation as the ovum released from \ previous cycle wil\ sti\\ be intact. Her fertile period starts immediately after menstruation has taken place as a