Technical Sciences Grade 10 P2 Eastern Cape November 2018 Memo

Downloaded from hlayiso.com NATIONAL SENIOR CERTIFICATE/ NASIONALE SENIOR SERTIFIKAAT GRADE/GRAAD 10 NOVEMBER 2018 TECHNICAL SCIENCES P2/TEGNIESE WETENSKAPPE V2 MARKING GUIDELINE/NASIENRIGLYN MARKS/PUNTE: 150 This marking guideline consists of pages 7./ Hierdie nasienriglyn bestaan uit 7 bladsye.

Downloaded from hlayiso.com 2 TECHNICAL SCIENCES P2 / TEGNIESE WETENSKAPPE V2 (EC/NOVEMBER 2018) QUESTION/VRAAG 1 1.1 A  (2) 1.2 B  (2) 1.3 C  (2) 1.4 B  (2) 1.5 D  (2) 1.6 B  (2) 1.7 B  (2) 1.8 D  (2) 1.9 C  (2) 1.10 A  (2) [20] QUESTION/VRAAG 2 2.1 Low density, Unreactive  (2) Lae digtheid,  onreaktief  2.2 2.2.1 Isotopes Isotope  (2) 2.2.2 Electrons e- Protons p+ Neutrons n0 Elektrone e- Protone p+ Neutrone n0 3 1 1 2 1 H 2 1 1 1 1 H 4 2 1 2 (6) 2 He 2.3 2.3.1 Noble gases or Inert gases Edelgasse  of onaktief gasse  (2) 2.3.2 1s22s22p63s23p6  (2) [14] QUESTION/VRAAG 3 3.1 3.1.1 Copper Carbonate  Koperkarbonaat  (1) 3.1.2 Sugar water  Suikerwater  (1) 3.1.3 Barium nitrate  Bariumnitraat  (1) 3.1.4 Carbon dioxide  Koolstofdioksied  (1) 3.1.5 Silver iodide  Silwer jodium  (1) 3.1.6 Salt water  Soutwater  (1) Copyright reserved / Kopiereg voorbehou Please turn over / Blaai om asseblief

Downloaded from hlayiso.com (EC/NOVEMBER 2018) TECHNICAL SCIENCES P2 / TEGNIESE WETENSKAPPE V2 3 3.2 3.2.1 KCl  (1) 3.2.2 Electrons are transferred√ from one atom (metal)  to another (non- metal) . This forms positive and negative ions which attract each other. Elektrone word oorgedra  van een atoom (metaal)  na 'n ander (nie-metaal) . Dit vorm positiewe en negatiewe ione wat mekaar aantrek (3) 3.2.3 Dissociation  (Accept: Ionisation ) Dissosiasie  (Aanvaar: Ionisation ) (1) 3.2.4 KCl(s)  → K+(aq)  + Cl-(aq)  Or/Of KCl(s)  → KOH(aq)  + HCl(aq)  (3) [14] QUESTION/VRAAG 4 4.1 A – Ammeter  Ammeter  B – Battery  or Cells  Battery of Selle  C – Switch  Skakelaar  (6) 4.2 It must form ions in solution  that are free to move./ Dit moet ione in oplossing vorm  wat vry is om te beweeg. (2) 4.3 Name of the substance Conduct or not:  or X Naam van stof Leiding of nie ( or ) Potassium Chloride Crystal X Kaliumchloriedkristal Distilled water X Gedistilleerde water Potassium Chloride solution  Kaliumchloried oplossing (3) 4.4 Increase in the reading  on apparatus A as a result of an increase in the concentration of solution. Toename in die lesing  op apparaat A as gevolg van ʼn toename in die konsentrasie van oplossing. 4.5 Dependent variable- Conductivity  or Ammeter reading  or glowing (brightness of bulb)  Independent variable – type of material used  (to test conductivity) Control variable- Number of cells (battery)  or type of cells (battery)  Afhanklike veranderlike – Konduktiwiteit  of Ammeterlesing  of gloeiend (gloei van gloeilamp)  Onafhanklike veranderlike – tipe materiaal wat gebruik word  (om geleidingsvermoë te toets) Beheer veranderlike – Aantal selle (battery)  of tipe selle (battery)  (3) Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com 4 TECHNICAL SCIENCES P2 / TEGNIESE WETENSKAPPE V2 (EC/NOVEMBER 2018) 4.6 Light bulb,  the bulb will glow brighter  to show conductivity./ Gloeilamp,  die gloeilamp sal helderder gloei  om geleidingsvermoë te toon. 4.7 4.7.1 Non-magnetic / Nie-magneties  (1) 4.7.2 Magnetic / Magneties  (1) 4.7.3 Non-magnetic / Nie-magneties  (1) 4.8 4.8.1 It is a material that does not allow heat energy to pass through it.  Dit is ʼn materiaal wat nie toelaat dat hitte-energie daardeur beweeg nie.  (2) 4.8.2 Plastic,  Wool,  Fibreglass,  Polystyrene  etc. (Any 2) Plastiek,  Wol,  Veselglas,  Polistireen  ens. (Enige 2) (2) 4.9 In ringing bells  / In klokke wat lui  In floppy disks  / in diskette  In alarm systems  / In alarmstelsels  In electric motors  / In elektriese motors  Electric cranes with magnets  / Elektriese hyskrane met magnete  In sound systems  In klankstelsels  (Any 3 / Enige 3) (3) [29] QUESTION/VRAAG 5 5.1 A cation is a positive ion  (atom or molecule) An anion is a negative ion  (atom or molecule)/ ʼn Katioon is ʼn positiewe ioon  (atom of molekule) ʼn Anioon is ʼn negatiewe ioon  (atoom of molekule) (2) 5.2 5.2.1 Potassium  +1  Kalium  +1  (2) 5.2.2 Aluminium  +3  Aluminium  + 3  (2) 5.2.3 Hydroxide  -1  hidroksied  -1  5.3 5.3.1 Iron (II) oxide  Yster (II) oksied  (2) 5.3.2 Calcium (II) Chloride  Kalsium (II) Chloried  (2) 5.4 5.4.1 HBr  (2) 5.4.2 CuO  (2) 5.4.3 MgCl2  (2) Copyright reserved / Kopiereg voorbehou Please turn over / Blaai om asseblief

Downloaded from hlayiso.com (EC/NOVEMBER 2018) TECHNICAL SCIENCES P2 / TEGNIESE WETENSKAPPE V2 5 5.5 5.5.1 Na2 is incorrect  rather 2Na as Sodium is not a diatomic molecule it is a metal in group 1.  (NaOH)2is incorrect√ it must be NaOH as Na+OH- is an ionic compound ratio is 1 : 1. / Na2 is inkorrek  eerder 2Na aangesien natrium nie ʼn diatomiese molekule is nie, dit is ʼn metaal in groep 1.  (NaOH)2 is inkorrek  dit moet NaOH wees as Na + OH- is ʼn ioniese verbinding met ʼn verhouding van 1 : 1.  (4) 5.5.2 Mg2Cl2 is incorrect  it must be MgCl2.  Magnesium is a 2+ ion and Chlorine is 1- ion so the ratio is 2 : 1. / Mg2Cl2 is inkorrek  dit moet MgCl2 wees. Magnesium is ʼn 2+ ioon en Chloor is 1- ioon dus die verhouding is 2 : 1 . (3) [25] QUESTION/VRAAG 6 6.1 CaCO3(s)  → CaO(s)  + CO2(g)  (3) 6.2 Reactant mass Reaktante massa = {40 + 3(16)}  = 100 amu/g.mol-1  Products mass Produkte massa = { (40 + 16) + (12 + 2(16)) }  = 100 amu/ g.mol-1  Reactants mass/Reaktante massa = Product mass/Produkte massa (4) 6.3 Heat is needed  to break up CaCO3(s) into simple compounds. Hitte is nodig.  Om CaCO3 (s) op te los in eenvoudige verbindings. (2) 6.4 The gas is passed through lime water  that is clear and a milky colour  will be observed. Die gas word deur kalkwater oorgedra.  Die water helder en ʼn melkagtige kleur sal  waargeneem word. (3) 6.5 Yes  To mix the substances evenly  Om die stowwe eweredig te meng  OR To distribute the heat evenly  OF Om die hitte eweredig te versprei  To prevent the cement from settling and hardening  Om te verhoed dat die sement verhard  (2) [14] Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief

Downloaded from hlayiso.com 6 TECHNICAL SCIENCES P2 / TEGNIESE WETENSKAPPE V2 (EC/NOVEMBER 2018) QUESTION/VRAAG 7 7.1 7.1.1 Halogens / Halogene  (2) 35 37 7.1.2 Cl Cl Number of protons 17 17 Aantal protone Number of electrons a. 17  b. 17  Aantal elektrone Number of neutrons c. 18  d. 20  Aantal neutrone Number of Nucleons 35 37 Aantal nukleone (4) 7.2 Nitrogen;  7 15N  / Stikstof  7 15N  (3) 7.3 7.3.1 True  Waar  (1) 7.3.2 False  Onwaar  (4) 7.4 7.4.1 3p ↑ ↑ ↑ 3s ↑↓ Energy/Energie 2s ↑↓ ↑↓ ↑↓  2s ↑↓ 1s ↑↓ (3) 7.4.2 2s ↑↓ ↑↓ ↑↓ 2s ↑↓ Energy/ Energie 1s ↑↓ (2) [16] Copyright reserved / Kopiereg voorbehou Please turn over / Blaai om asseblief

Downloaded from hlayiso.com (EC/NOVEMBER 2018) TECHNICAL SCIENCES P2 / TEGNIESE WETENSKAPPE V2 7 QUESTION/VRAAG 8 8.1 Heat is a form of energy (that can give rise to temperature if transferred).  Temperature is a measure of how hot or cold an object/body is. / Hitte is ʼn vorm van energie (dit kan aanleiding gee tot temperatuur indien dit oorgedra word).  Temperatuur is ʼn mate van hoe warm of koud ʼn voorwerp / liggaam is.  (4) 8.2 Alcohol thermometer  / Alkohol termometer  Mercury thermometer  / Kwiktermometer  Thermoelectric thermometer  / Termo-elektrisiteit  (3) 8.3 It is used in medicine.  / Dit word in medisyne gebruik.  It is used in scientific research / science laboratories  Dit word gebruik in wetenskaplike navorsing  / wetenskaplaboratoriums  It is used in meteorology / study of weather  Dit word gebruik in meteorologie  / studie van weer  To control and regulate processes in industry  / Om prosesse in die bedryf te beheer en te reguleer  (Any 3/Enige 3) (3) 8.4 8.4.1 A – Thermometer / Termometer  B – Glass rod / Glasstang  C – Test Tube  / Proefbuis  D – Bunsen burner  / Bunsenbrander  E – Glass beaker  / Glasbeker  (5) 8.4.2 It is used as a stirrer  so that heat is evenly distributed./ Dit word gebruik om in mengsel te roer  sodat hitte eweredig versprei word. (2) 8.4.3 It is flammable.  Dit is vlambaar.  (1) 8.4 Sound waves/Seismic waves/Earthquake (Any 2) / Klankgolwe/Seismiese golwe/Aardbewings (Enige 2)  (2) [18] TOTAL/TOTAAL: 150 Copyright reserved/Kopiereg voorbehou Please turn over/Blaai om asseblief