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Unit 4 - Answers to activities 1, 2, 3

Unit 4 - Answers to activities 1, 2, 3. Page 47 1.- Copy the sentences into your exercise book and complete the spaces. a) Raw materials can be of animal , vegetable or mineral origin. b) Raw materials are used to make manufactured goods .

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Unit 4 - Answers to activities 1, 2, 3

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  1. Unit 4 - Answers to activities 1, 2, 3 Page 47 1.- Copy the sentences into your exercise book and complete the spaces. a) Raw materials can be of animal , vegetable or mineral origin. b) Raw materials are used to make manufactured goods . 2.- Copy the table into your exercise book and put the following raw materials in the correct column. Add other materials to complete the table. [materials: wool marble cotton clay cork sand silk] 3.- Which raw material do these materials come from? Glass, steel, plastic, porcelain, planks, concrete Glass: sand Steel: iron Plastic: petroleum, carbon, natural gas, cellulose, animal proteins Porcelain: clay Planks: wood (tree trunks) Concrete: cement, gravel, sand, water

  2. Unit 4 - Answers to activities 4, 5 Pag 47 4.- What manufactured goods can we make from the materials in exercise 2? With a partner think of three objects for each one and write them in your exercise book. Suggested answers: Glass: jug, drinking glass, plate, windscreen, shop window, etc. Steel: structure of a bridge, handrail, household appliance, chair or table legs, nut and bolt, tools Plastic: bucket, bowl, mug, bottle, wire insulation Porcelain: jug, cup, tile Wooden planks: chair, table, shelf, door Concrete: building blocks, reinforced concrete for foundations, beams 5.- Listen and repeat.. Which one is the odd one out? Why? a) Glass is not a petroleum derivative. b) Brick is not a wook derivative. c) Thread is not a stone derivative.

  3. Unit 4 - Answers to activities 6, 7, 8, 9 Page 47 6.- (Student’s own answer). 7.- Use your dictionary and classify the following textiles materials into natural or synthetic: polyester, cotton, polyamide, wool, jute, nylon, rayon, silk, linen. Natural: cotton, wool, jute, silk, linen Synthetic: polyester, polyamide, nylon, rayon 8.- Student’s own answer, example: My jacket is made of polyester. 9.- How do we use these types of stone? Granite: flooring, work sufaces, building stone, sculpture Marble: sculpture, building stone, table tops Slate: roofing, flooring, garden decorations, knife sharpeners

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