Gr6 NS & TEC (ENG) June 2022 Possible Answers hlayiso.com

Downloaded from hlayiso.com PROVINCIAL EXAMINATION JUNE 2022 GRADE 6 MARKING GUIDELINES NATURAL SCIENCES AND TECHNOLOGY 7 pages

Downloaded from hlayiso.com MARKING GUIDELINES NATURAL SCIENCES AND TECHNOLOGY GRADE 6 ASSESSMENT FRAMEWORK SECTION A MARKS QUESTION 1: MULTIPLE-CHOICE QUESTIONS 5 QUESTION 2: MATCHING ITEMS 5 QUESTION 3: TRUE OR FALSE 5 QUESTION 4: ONE WORD FOR 5 QUESTION 5: DIAGRAM AND LABELS 10 30 SECTION B MARKS QUESTION 6: DIFFERENTIATE, COMPARE, ILLUSTRATE 14 QUESTION 7: USE OF KNOWLEDGE, ILLUSTRATE 7 21 SECTION C MARKS QUESTION 8: CASE STUDY/INVESTIGATION 5 QUESTION 9: DISCUSS,DIFFERENTIATE 4 9 TOTAL 60 2

Downloaded from hlayiso.com MARKING GUIDELINES NATURAL SCIENCES AND TECHNOLOGY GRADE 6 SECTION A QUESTION 1 MARKS 1.1 C 1 1.2 B 1 1.3 D 1 1.4 B 1 1.5 B 1 [5] QUESTION 2 2.2 C 1 2.3 A 1 2.4 B 1 2.5 F 1 2.6 E 1 [5] QUESTION 3 3.1 False  1 3.2 True  1 3.3 False  1 3.4 True  1 3.5 False  1 [5] 3

Downloaded from hlayiso.com MARKING GUIDELINES NATURAL SCIENCES AND TECHNOLOGY GRADE 6 QUESTION 4 MARKS 4.1 Solvent  1 4.2 Rate  1 4.3 Settling  1 4.4 Matter  1 4.5 Evaporation  1 [5] QUESTION 5 5.1 A mixture in which we cannot identify the different substances.  When a solute dissolves into a solvent so that nothing settles, the solution looks glassy and you cannot see the solute anymore.  2 5.2 A Solute/copper sulphate  1 B Solvent/water  1 C Solution  1 5.3 Copper sulphate  1 5.4 Water  1 5.5 Evaporation  1 5.6 Stirring/Temperature/Grain size (Any two)  2 [10] TOTAL SECTION A 30 4

Downloaded from hlayiso.com MARKING GUIDELINES NATURAL SCIENCES AND TECHNOLOGY GRADE 6 SECTION B QUESTION 6 MARKS 6.1 6.1.1 No more solid will dissolve in the solution  or the solid will settle at the bottom.  1 6.1.2 To increase the rate of dissolving  1 6.1.3 Chocolate, flour and oil  ½ – insoluble in water  ½ 1 6.2 Oil Water 2 6.3 Sieving – A method of separation that allows small particles to pass through the holes of a sieve but catches the bigger particles  Decanting – A method of separating a mixture of a liquid and a solid where the solid has formed a sediment  2 6.4 Mixtures Phases of matter Soluble or Is the mixture a (Solid, Liquid, Gas) Insoluble? solution? (Yes/No) Sugar Solid  (1) and and Soluble  (1) Yes  (1) Water liquid Oil Liquid  (1) Insoluble  (1) No  (1) and and Water liquid  (1) 7 [14] 5

Downloaded from hlayiso.com MARKING GUIDELINES NATURAL SCIENCES AND TECHNOLOGY GRADE 6 QUESTION 7 MARKS 7.1 The mixture that is stirred will dissolve faster than the one that is not stirred. 1 7.2 The jar size/The amount of water/The amount of salt (ANY TWO) 2 7.3 One jar will be stirred. 1 7.4 7.4.1 60 50 Time (seconds) 40 30 20 10 0 Stirring Without stirring Factor 2 7.4.2 A solution/mixture dissolves faster when it is stirred. 1 [7] TOTAL SECTION B 21 6

Downloaded from hlayiso.com MARKING GUIDELINES NATURAL SCIENCES AND TECHNOLOGY GRADE 6 SECTION C QUESTION 8 MARKS 8.1 One teaspoon fine salt  1 8.2 The bigger grain size takes longer to dissolve.  1 8.3 Break the tablet up into pieces./Crush into a powder form.  Use hot water to dissolve it.  2 8.4 There is too much sugar for the amount of water. The water is saturated  1 [5] 9.1 Wetlands are important to living things because … - they provide a habitat  OR - they act as sponges  OR - they are a source of water  OR - they filter water to make it clean.  (Any TWO) 2 9.2 Wetlands are destroyed by the increase in the world’s population.  (AND) More and more land is needed for housing, agriculture and industry.  2 [4] TOTAL SECTION C 9 TOTAL 60 7