UNIT_3. TECHNICAL MATERIALS.

KEY WORDS: raw materials, manufactured goods, to tear(romper con las manos), to smooth(lijar), drawer(cajón), card(cartulina), cardboard(cartón),alloy,

BOOK UNIT Nº10 (link here to see it): "FORCES": 

* The aim of the test is..
* Properties: "These steel cables can resist tension. They are able to resist tension". 
* Passive form: "This plastic can be stretched, but it cannot be compresed".
* Verbs that contain the idea of cause as part of their meaning: Harden, lighten, widen, etc.
* Colour: reddish, bluish, greenish, etc. 

INDEX:

* INTRODUCTION: VIDEO 
1.- TECHNICAL MATERIALS.

2.- ALLOYS.

3.- PROPERTIES

4.- MANUFACTURED PROCEDURES.

0.- INTRODUCTION: Whatch this youtube (FiberGlass from Airbus of National Geographic.) and answare the folloween questions:



1.    Write True or False

• a.    The first material in the Airbus 380 is light weight steel. True
• b.    Glass becomes a liquid at about 270 º Farenheit. True
• c.    Fiber glass is stronger and more flexible than ordinary glass True 
• d.    Fiber glass can be woven like textiles to produce sheets of material True
• e.    The window doesn´t break because the individual fibers don´t break True
• f.    The aluminum provide strength to the composite False 

2.    Fill in the gaps

• a.    The outer ………skin……….. of the Airbus 380 must be superlight and …super strong…………………
• b.    Fiber glass is about …six……… to ten times the …………strength……… of steel
• c.     ……liquid….. resin is added afterwards
• d.    When it dries it ……stick……. the fibers together to create glass in its …strongest……………. Foam.
• e.    Fiber glass is even ……tougher………… when combined in a composite with …aluminium………………
• f.    ………Aluminium……….. provides the strength that ………glass…………… lacks

3.    Answer this question: In the video the terms “Glass fiber” and “Fiber glass” are mentioned:
Are they the same thing? What does each term mean?

No, glass fiber is the material that you use to make fiber glass and fiber glass is made of glass fiber