2020 NOVEMBER EXAM PAPER GR5 NS TECH

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Question 1: Multiple choice (10) Select one correct answer and make a circle around the correct letter. 1.1Which one of the following is NOT a property of a metal? a) They are strong b) They are shiny c) They break easy d) They are ductile 1.2Which metal is NOT magnetic? a) Brass b) Nickel c) Steel d) lron 1.3 A radio changes electrical energy into energy a) Light b) Heat c) Movement d) Sound 1.4 South -Africa's main power station uses. a) Water b) Wind c) Sun d) Coal 1.5 The input energy for an electrical lightbulb is. a) Light b) Heat c) Electricity d) Stored 1.6 When there is a fire in the house you must_ a) Play with matches b) Use fuel to put out the fire c) Get out of the house d) Open a window 1.7 One of the disadvantages of iron is that it a) Rusts b) lt's shiny c) lt's a soft metal d) lt's a polymer 1.8 A fish's habitat is a) Savana b) water c) Desert d) ln the mountains

1.9 A generator a) Creates heat energy b) Creates light energy c) Creates electrical energy d) Creates sound energy 1.10 \/Vlrich one of the following is NOT part of a torch's electrical circuit? a) Plastic wires b) Light bulb c) Switch d) Batteries Question 2: True or false (5) State weather the following statements are True or False. 2.1 Metals can be used too make aeroplanes. 2.2 When metals tarnish they go reddish brown. 2.3 Wnd Turbines is a renewable power source. 2.4 Always use electrical appliances with wet hands. 2.5 The national grid explains how electricity is made Question 3: Column A and B (5) Match column A with column B, write your answer in column G Colum A Column B Column C 3.1 Wood a. Source of stored energy 31 3.2 Non-metal b. Fuel 3.2 3.3 A person running c. Steel 3.3 3.4 Metal d. Properties 3.4 3.5 Battery e. Movement energy 35 f. Glass g. Brittle h. Corrode

Question 4: Safetv with fire (7) Answer the followi ng questions 4.1 Labelthe FIRE TRIANGLE a) b) c) 4.2tist two ways how you can prevent a fire 4.3 Predict what would happen if you open a window while the house is burning (give a reason for your answer) Question 5: Electricitv (5) Explain what happens in a coal power station by completing the steps 1. Coal burns in a burner 2

3. 4. 5. 6 Question 6: lnput- and output enerov 6.1 Compare different types of energy and fuels by completing the table below (6) Fuel lnput energy Output energy Wood Heat Light and heat Light bulb 6.1.1 6.1.2 Heater Electrical 6.1.3 Food 6.1.4 Movement 6.1.5 Heat Heat and light Speaker Electrical 6.1.6 6.2 Explain how energy changes when you use a gas stove (3) Burning Output energy: of fuel 6.2.3 6.3ldentify the input- and output energy in the following pictures: (4) 6.3.1 A person ironing clothes lnput energy: Output energy:

6.3.2 An electrical fan lnput energy: Output energy: stations Questlon 7 : Coal power stations (5) Power stations use different ways to generate electricity. A power station needs a source of energy. ln South Africa, most of our power stations bum coal to use the energy stored in coal to generate electricity. Answer the following questions about coal power stations. 7.1 Predict what would happen in South-Africa if there were no more coal left to make electricity 7.2 Suggest two other ways South-Africa can generate electricity without burning coal 7.3 Why would you say that Coal power stations is not the best method to generate electricity? Total: 50 Eryoy your hclidaylll r.* )tu' f*1 VS ';-+ H ! ^l