Unit 4 - Answers to activities 1, 2, 3

haplessuseUrban and Civil

Nov 25, 2013 (3 years and 10 months ago)

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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



Unit 4
-

Answers to activities 1, 2, 3

Porcelain: clay


Planks: wood (tree trunks)


Concrete: cement, gravel, sand, water



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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.


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 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

Unit 4
-

Answers to activities 6, 7, 8, 9