Grade 5 NS Tech Memo November 2021

MEMORANDUM NS/TECH EXAMINER: MRS GROVES DATE: NOVEMBER 2021 TOTAL MARKS: 45 GRADE: 5 DURATION: 1 HOUR MODERATOR: MRS FOURIE Question Answer Mark Level 1. 1.1 True✔ 1.2 True✔ 5 1 1.3 False✔ 1.4 True✔ 1.5 False✔ 2. 2.1 Gas✔ 2.2 Heat and light✔✔ 5 2 2.3 Any two✔✔ 1. Do not play with matches, lighters or any flammable liquids. 2. Fuel such as petrol should never be poured onto a burning fire. 3. Candles must always be placed in sturdy candleholders. Never put a burning candle near flammable objects such as curtains or books. 4. Always place fireguards in front of fireplaces. 5. Never dry clothes on or near a heater or cooker. 6. Cooking should always be done under adult supervision. Never leave pots unattended. 7. If you suspect a gas leak from a cylinder, turn off the supply and call a gas supplier. 8. Do not use damaged electrical appliances. 9. Ensure that a fire is extinguished after having a braai or making an open fire. 3. 3.1 correct drawing✔ negative✔ positive ✔ 11 1 3.2.1 chemical ✔ electrical✔ 2 3.2.2 negative ✔ positive ✔ 3.2.3 energy✔ light/sound/heat/movement✔ 3.2.4 power station ✔ 3.2.5 distribution cables ✔

4. 1. F ✔ 2. D✔ 5 1 3. B✔ 4. A✔ 5. C✔ 5. Mains electricity is made in power stations✔ Coal is the main source of energy in South African homes. ✔ 6 3 The electricity is transferred from the power stations to substations. ✔ Then to places where it is needed such as homes, schools, factories etc. ✔ Electricity is carried through cables called transmission lines. ✔ These transmission lines are supported and carried by huge structures called pylons. ✔ 6. 6.1 South Africa✔ 6.2 Core✔ 8 2 6.3 3500km✔ 6.4 Antarctica 6.5 Crust 10 km thick under the ocean and 75km the continents✔ 6.6 2900km✔ 6.7 Mantle✔ 6.8 Crust✔ 7 7.1 A fossil is any preserved remains, impression, or trace of any once-living thing from a past. ✔ 5 4 7.2 It can be found in bedrock. ✔ 7.3 a. 0% ✔ b. 75% ✔ c. 25% ✔