Presentación tecnología unit 3

1. Raw Material, Material and goods
Thinking routines

2. Good
Material
Raw material
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Natural resources from
which the materials we use
in technological activity are
obtained
the substance of which
something is made

3. 3

4. Vegetable: wood, cotton, cork
Animal: wool, silk
Mineral: clay, granite, slate, metallic ore

5. Wood
Cotton
Cork
Cap
2

6. Wool
(ball, skein)
Silk
(robe, dressing gown, housecoat)
2

7. Clay
Granite
Tin
Tin/Canslate
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8. Renewable
Non renewable
Oil / Petroleum
2
Over exploited quarry

10.  Wool
 Marble
 Cotton
 Clay
 Sand
 Silk
 Cork

11.  Glass
 Steel
 Plastic
 Cotton
 Porcelain
 Concrete
 Iron

12.  Mechanical strength
 tensile strength
 compressive strength
 Flexural strength
 Video iphone
 Torsional strength
 Video
 Shear strength
10

13.  Elasticity
 Plasticity
 Ductility.- (ductile).
 Malleability.- (malleable).
5

14.  Hardness
 Toughness/Brittleness
 Permeability / impermeability.
5

15.  Electrical properties:
 You can make the handle of the electrician scissors out
of plastic because it is an electrical insulator.
 Thermal properties:
 You can make the handle of the pan out of plastic
because it is a thermal insulator.
 Acoustic Properties:
 You can reduce the sound using mineral wool because
it is an acoustic insulator
4

16.  Magnetic properties:
 video.
 Optical properties:
 Opaque
 Transparent
 Translucent
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17.  Oxidation
2

18.  Recyclable material
 Glass, paper, cardboard, some metals, some plastics
10
Landfill /rubbish dump
Rubbish/garbage/trash
Bin, container
Recycling center
When we reuse and recycle we conserve natural
resources and reduce the accumulation of waste
products which damage the environment.

19.  Toxic material
 Heavy metals
3
These materials contaminate the environment (soil, the water and the
atmosphere). They can be poisonous for living things.

20.  Biodegradable material
 Paper.
 Organic material.
 Specific plastics.
6
Activity
These are materials that decompose
naturally and don't cause damage to the
environment.

21. And derivatives

22.  Wood is classified into:
 Natural:
 Hardwood
 Softwood
 Derivatives
 Paper, cardboard, card
 Plywood, chipboard, fiberboard, hardboard and cork.

23.  Derivatives
 Plywood
 Chipboard
 Fiberboard
 Hardboard

24. Metals are materials with many use in the transport
and telecommunication industries, in agriculture,
in construction and in manufacturing machinery.

25.  According to
 Pure metals: Metals whose
crystalline structure is
composed of only one
metallic element. For
example: gold, silver, iron,
copper etc.
 Metal alloys or alloys: These
are a combination of one or
two metals. One of them
has to be a metal For
example: bronze, tinplate,
steel, cast iron, brass

26.  According to
 Ferrous:
 Iron (the pure metal), steels, alloy
steels and cast-iron.
 Non-ferrous:
 Ultralight: Magnesium
 Light: Aluminium and titanium.
 Heavy: All the other metals are
heavy.
Steel sections

27.  The general properties of metals.
 Toughness: The ability to support impacts without
breaking. Metals are tough.
 Ductility: The ability to form wires.
 Malleability: The ability to form sheets.
 Hardness: Scratch resistance. Metals are relatively
hard materials.
 Electrical and thermal conductivity: Metals conduct
heat and electricity well.
 Metallic shine: Metals characteristically shine after
being recently cut.
 Most of them are toxic, recyclable and reusable
 Some of them are magnetic. (Iron, steel, cast iron)
 Except mercury all metals are solid at room
temperature.

28.  The process of obtaining metals
 Mining
 Obtaining the metals from mines.
 Separation of the mineral into ore and gangue
 The metal is extracted from the ore in an ironworks
through physical and chemical processes

29.  Metallurgy
 The technology of metals
 Technique of obtaining and
producing metals from the
ores that contain them. It
studies its properties too
 Siderurgy (ironworks)
(Steel and iron industry)