EXAMINATIONS COUNCIL OF SWAZILAND Swaziland General Certificate of Secondary Education

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1 EXAMINATIONS COUNCIL OF SWAZILAND Swaziland General Certificate of Secondary Education COMBINED SCIENCE 6886/01 Paper 1 (Short Answers) October/November 2013 Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs, tables or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Answer all questions. Electronic calculators may be used. You may lose marks if you do not show your working or if you do not use appropriate units. Write your answers in the spaces provided on the question paper. A copy of the Periodic Table is printed on page 16. The number of marks is given in brackets [ ] at the end of each question or part question. 1 hour This document consists of 13 printed pages and 3 blank pages. [Turn over

2 1 List two characteristics of living organisms Rb 3 PO 4 is a formula of a compound. (a) State the number of elements present in this compound. (b) Define an element. 3 Fig shows a wooden wheel strengthened by putting a tight iron ring around it. wooden wheel iron ring Fig. 3.1 State what can be done to the iron ring to make it easier to fit over the wood State the piece of apparatus that can be used to transfer 10 cm 3 of liquid drop by drop....

3 5 Fig. 5.1 shows Jabu touching the metal cap of a charged gold leaf electroscope. 3 metal cap metal plate gold leaf Fig. 5.1 Explain why the gold leaf would collapse towards the metal plate Define diffusion [2] 7 An atom of an element is represented as Z. (a) Predict the Group the element will occupy in the Periodic Table. (b) State the symbol of the element that occupies this position in the Periodic Table. [Turn over

4 8 Fig. 8.1 shows two blood vessels D and E. 4 D E Fig. 8.1 State two visible differences between the blood vessels, D and E [2] 9 Zanele accidentally pours salt into a container of water. State a suitable separation method that she can use to obtain both the salt and water Fig shows a circuit with four lamps connected in series. 12 V Fig The circuit is switched on but the filament in one of the lamps blows. State what happens to the other lamps....

5 11 The Ministry of Health encourages people to use condoms when engaging in sexual intercourse. 5 State two advantages of using a condom [2] 12 Bromine, chlorine and iodine are elements found in Group VII of the Periodic Table. (a) State the general name for Group VII elements. (b) Chlorine gains an electron to have a full outer shell. State the electronic configuration of a chloride ion. 13 Fig shows a sheet of paper placed between a radioactive source and a detector. radioactive source sheet of paper detector Fig Name the type of radiation that is stopped by the paper.... [Turn over

6 14 Fig shows the human digestive system. 6 F G H I Fig (a) State the letter of the part which absorbs water from undigested food. (b) State the function of the part labeled H in Fig

7 15 Fig shows models of various substances labelled J, K, L, M and N. 7 J K L M N Fig (a) Which of the models, J, K, L, M and N, is likely to be a model of the structure of (i) steel,... [1] (ii) oxygen gas.... [1] (b) Which two of the models, J, K, L, M and N, are diatomic molecules? 16 Fig shows weights of four objects, 1, 2, 3 and 4, compared using a balance Fig Which object is the lightest?... [Turn over

8 17 Fig shows the effect of temperature on the rate on an enzyme-controlled reaction rate of reaction / AU temperature / C Fig (a) State the optimum temperature for this enzyme. (b) the graph to find the rate of reaction at 28 C. 18 State how the vacuum in a vacuum flask reduces heat loss AlCl 3 is an ionic compound. Name this compound....

9 20 Fig shows a rubber ball dropped from a height of 2 m onto a table. Whilst in contact with the table, some energy is converted into heat energy. 9 ball released from this height height 4 m 2 m A B C D 0 table Fig Which of the points, A, B, C or D is the highest possible point that the ball could reach after bouncing off the table? Table 21.1 shows the percentages of gases in expired and inspired air. Table 21.1 gas % in inspired air % in expired air S T U Name gas U.... [Turn over

10 22 A student carries out an experiment to plot the extension-load graph for a spring. Fig shows the apparatus at the start of the experiment, and with the load added. 10 start with load x y Fig State the extension caused by the load in terms of x and y Fig shows a cross section of a peanut seed. V W X Y Fig Circle the letter of the part that develops into a shoot. [1] 24 Describe how the volume of an irregular object can be measured [2]

11 25 Mr. Dlamini s field has been giving him a poor crop yield year after year. He is advised to neutralise and improve his soil. 11 (a) Describe neutralisation.... (b) Name a substance he can use to neutralise his soil. 26 The initial kinetic energy of a ball when thrown up is 30 J. State the speed of the ball at its highest point Fig shows a resistor connected in series with a 3.0 V battery. 3.0 V I 12 Calculate the current I in the circuit. Fig I =... [1] [Turn over

12 28 Fig shows the structure of an atom in terms of protons, neutrons and electrons. 12 e e Key e proton neutron electron e Fig State the nucleon number of the atom....

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16 16 DATA SHEET The Periodic Table of the Elements Group I II III IV V VI VII H Hydrogen 2 4 He Helium 3 7 Li Lithium 4 9 Be Beryllium 5 11 B Boron 6 12 C Carbon 7 14 N Nitrogen 8 16 O Oxygen 9 19 F Fluorine Ne Neon Na Sodium Mg Magnesium Al Aluminium Si Silicon P Phosphorus S Sulfur Cl Chlorine Ar Argon K Potassium Ca Calcium Sc Scandium Ti Titanium V Vanadium Cr Chromium Mn Manganese Fe Iron Co Cobalt Ni Nickel Cu Copper Zn Zinc Ga Gallium Ge Germanium As Arsenic Se Selenium Br Bromine Kr Krypton Rb Rubidium Sr Strontium Y Yttrium Zr Zirconium Nb Niobium 96 Mo Molybdenum Tc Technetium Ru Ruthenium Rh Rhodium Pd Palladium Ag Silver Cd Cadmium In Indium Sn Tin Sb Antimony Te Tellurium I Iodine Xe Xenon Cs Caesium Ba Barium 139 La Lanthanum 57 * Hf Hafnium Ta Tantalum W Tungsten Re Rhenium Os Osmium Ir Iridium Pt Platinum Au Gold Hg Mercury Tl Thallium Pb Lead Bi Bismuth 84 Po Polonium 85 At Astatine 86 Rn Radon Fr Francium Ra Radium 227 Ac Actinium 89 * Lanthanoid series Actinoid series Key b a X a = relative atomic mass X = atomic symbol b = atomic (proton) number Ce Cerium 232 Th Thorium 141 Pr Praseodymium Pa Protactinium Nd Neodymium 238 U Uranium Pm Promethium Sm Samarium Eu Europium Gd Gadolinium Tb Terbium Dy Dysprosium Np Neptunium 94 Pu Plutonium 95 Am Americium 96 Cm Curium 97 Bk Berkelium 98 Cf Californium Ho Holmium Es Einsteinium Er Erbium Fm Fermium Tm Thulium Md Mendelevium Yb Ytterbium No Nobelium Lu Lutetium Lr Lawrencium 103 The volume of one mole of any gas is 24dm 3 at room temperature and pressure (r.t.p.).

This resource contains three different versions of the periodic table, including a blank one for colouring!

Teaching notes This resource contains three different versions of the periodic table, including a blank one for colouring! It also contains tables of the Group 0, 1 and 7 elements with a few columns for