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, concreteGlass: sand Steel: iron Plastic: petroleum, carbon, natural gas,

cellulose, animal proteins

Unit 4 - Answers to activities 1, 2, 3

Porcelain: clay Planks: wood (tree trunks) Concrete: cement, gravel, sand, water

Pag 474.- What manufactured goods can we make from the materials in exercise 2? With apartner 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.

Unit 4 - Answers to activities 4, 5

Page 47 6.- (Student’s own answer).

7.- Use your dictionary and classify the following textiles materials into natural orsynthetic: 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, sculptureMarble: sculpture, building stone, table topsSlate: roofing, flooring, garden decorations, knife sharpeners

Unit 4 - Answers to activities 6, 7, 8, 9