1C Desiree Zdeb Leila Moreno by Desi https://padlet.com/desicabra/c4413uuoetdj en-us 2017-11-27 08:45:42 UTC 2025-11-18 06:07:27 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Hearts.png Processed materials desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/210819054 When we process raw materials,they become processed material (also called manufactured materials).]]> 2017-11-28 10:57:22 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/210819054 Raw materials desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/210820980 Raw materials are materials taken directly from nature that we process into other materials to make products with.]]> 2017-11-28 11:04:23 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/210820980 Natural materials desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/210821423 We prepare or refine raw materials to obtain natural materials]]> 2017-11-28 11:06:16 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/210821423 Technical materials desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/210824641 Any material use to construct an object is called a technical material.]]> 2017-11-28 11:19:03 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/210824641 Exercise 1 pg 77 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/212739164 Animals: wool,silk
Plants: linen,cork
Minerals: marble,clay,sand]]> 2017-12-04 08:31:37 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/212739164 Exercise 2 pg 77 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/212741374 sheep-wool-scarf
rock-marble-furniture
rock-clay-bricks
plant-cotton-clothes
spider-silk-clothes]]> 2017-12-04 08:39:40 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/212741374 Exercise 3 pg 77 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/212744512 Natural materials: slik,slate
Processed materials: latex,cork,lycra,brass]]> 2017-12-04 08:53:09 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/212744512 Choosing materials desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/212745677 Each material has certain characteristics or properties that make it suited to a certain use.]]> 2017-12-04 08:59:44 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/212745677 Exercise 5 pg 78 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/212746023 Shoe: strong and attractive
Partition wall: can build with and strong
Streetlight: strong
Stay cables: cheap and avaliable]]> 2017-12-04 09:01:32 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/212746023 Exercise 6 pg 78 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/214924171 An umbrella: cheap
A chair: strong
Frying pan: cheap and strong]]> 2017-12-11 08:40:52 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/214924171 Exercise 9 pg 79 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/214925272 Plastic or wood chair: ·Advantages:
-Its cheaper
-Combine well with the decoration
-They are comfortable
-It is made with a waterproof material
-They are light
-They are strong and durable

·Disadvantage:
-It cab be broken more easily
-They damage nature

A earring out of silver or aluminium:
·Advantages:
-Decorate the ears
-Its good for our health

·Disadvantages
-There may be infections in the holes because there are people who have silver allergies
]]> 2017-12-11 08:46:05 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/214925272 Exercise 10 pg 79 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/215354492 Car headlight: strong, transparent
A mattress: nice to touch,soft
Golf Club: strong,hardness]]> 2017-12-12 11:15:23 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/215354492 4 Properties of wood 2 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219003561 Wood has several properties that are undesirable in technical applications:
-Combustion
-Moisture
-Rotting and insect attack

Exercise 11 pg 80
We can use wood as a technical material because is a thermal conductor,it is not hard and is light.But wood is not flexible and it can break easily]]> 2018-01-05 18:10:02 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219003561 Properties of wood 1 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219004449 -Tensile strength: It is good in the longitudinal direction and poor in the transverse direction.
-Comprensive strength: It is better in the transverse direction than in the longitudinal direction.
-Flexural strength: It is good, but better in the transverse direction.
-Hardness: This can vary a lot. It depends on the type of wood,the structure and the cutting direction.Wood is not very hard and this makes it easier to work with.
-Toughness: Wood is tough,so is used in sports equipments.
-Thermal and electrical conductivity: It is very low.Wood is a good insulator of heat and electricity.
-Sound conductivity: Is good.This is why it is used as a material to make certain musical instruments.
-Colour: Different woods have different colours.The latter types of wood are prized for making furniture,woods with less interesting colours are used in construction.
-Density: Wood is a light material. It has a lower density than water,which means that it floats.]]> 2018-01-05 18:13:38 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219004449 5 Wood products desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219012265 Man-made wood:
-Plywood
-Chipboard]]> 2018-01-05 18:48:09 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219012265 5 Wood products desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219016200 Wood derivates:
-Paper
-Cardboard
-Cork]]> 2018-01-05 19:00:59 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219016200 Exercise 12 pg 81 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219019776 Natural woods: pine, ebony, beech,,ash,fir and lime.
Man-made woods: plywood and chipboard
Wood derivatives: paper,cork and carboard.]]> 2018-01-05 19:15:04 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219019776 7 Metallic materials desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219020589 Mechanical properties:
-They are hard
-Some are malleable
-Some are ductile
-They are tough
Thermal properties:
-They are very good conductors of heat
-They expand when the temperature rises and contract  when it falls.
-Some metals can be easily soldered.
Electrical and magnetic properties:
-They are very good conductors of electric current.
-Some have a magnetic behaviour and can attract other metals.]]> 2018-01-05 19:18:27 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219020589 7 Metallic materials desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219022321 Classifying  metals: Metals that contain mainly iron are called ferrous metals.Metals that do not have iron in their composition are called non-ferrous metals.]]> 2018-01-05 19:25:23 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219022321 7 Metallic materials desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219023172 Stock forms of metal
-Plates
-Sections
-Ingots]]> 2018-01-05 19:28:49 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219023172 8 Ferrous materials desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219023866 Iron: When the percentege of carbon in the alloy is less than 0.1%, we call this material iron.
Steel: Steel is a ferrous material made mainly from iron with 0.1% to 2% carbon.
Cast iron: Cast iron is made from iron and 2% to 6.67% carbon.]]> 2018-01-05 19:32:34 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219023866 Exercise 18 pg 85 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219024860 Steel is tougher than cast iron.]]> 2018-01-05 19:37:42 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219024860 9 Non-ferrous metals. desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219025464 Copper: This is a bright red-coloured metal that has been used since ancient times.
Tin: Is a silver-coloured shiny metal that is very resistant to corrosion.
Aluminium: Is the third most common element is the earth crust. It is white,shiny,cheap and easy to recycle.
Zinc: It is bluishwhite in colour and is one of the least common metals.]]> 2018-01-05 19:40:24 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219025464 Exercise 22 pg 87 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219027855 The metal that we can find in a oca-cola can and a Boeing is the aluminium.]]> 2018-01-05 19:50:49 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219027855 Exercise 23 pg 87 desicabra https://padlet.com/desicabra/c4413uuoetdj/wish/219028189 To make a statue I would use bronze because is strong.

To make a sardine tin I would use tin because is not toxic.

To make wires I would use copper because is a good conductor of electricity.]]> 2018-01-05 19:52:19 UTC https://padlet.com/desicabra/c4413uuoetdj/wish/219028189