Working with materials
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It takes 20 days to be descomposed It takes more than 100 years It takes more than 4000 years
Transcript of Working with materials
It takes 20 days to
be descomposed
It takes more
than 100 years
It takes more
than 4000 years
The objects we use in our everyday life are
manufactured from different types of materials.
Wood
Steel
PlasticGlass
Wool
Marble
Many of these materials are originated in nature.
Wood
Cork
Wool
Petroleum
Iron
Gold
Clay
Marble
Cotton
And we call them raw materials.
Raw materials are
substances that are
extracted directly from
nature.
Raw materials can be classified into three
categories:Animal origin: wool, silk…
Vegetable origin: cotton, wood, cork,
linen…
Mineral origin: marble, clay, iron…
However, in the production of objects, materials can´t be used as they are found in nature.
tree trunk board
Raw materials are subjected to
modifications, to some kinds of
transformations
The materials resulting to these transformations are called processed materials.
tree board
plastic
petroleum
sheep
wool
iron ore
steel block
With the processed materials, humans createmanufactered goods.
board
plasticwool
steel block
A manufactered goods
is any object created by
humans to satisfy their
needs and improve their
standard of living.
With the processed materials, humans createmanufactered goods.
NATURAL
RESOURCES
RAW
MATERIALS
PROCESSED
MATERIALS
MANUFACTERED
GOODSRECYCLED
MATERIALS
From a technical point of view, the materials we use to
product objects can be classified into five groups.
Wood is a natural material that
comes from trees.
METAL
WOOD
Metals come from
minerals extracted from
mines.
Plastic is a synthetic material
obtained primarily from
petroleum
PLASTI
C
Some of textile materials are
obtained from raw materials
(silk, cotton…)
TEXTILE
MATERIALS
The great majority are syntethic ones
(rayon, polyester…)
Stone materials are
natural in origin.
They consist primarily of
stone and sand.
They consist mainly of clay.
CERAMIC
MATERIALS
STONE
MATERIALS
Ceramic materials
are natural in origin
too.
These technical materials the are used:
To produce the objects we use in our everyday life
To construct all kinds of machines
To build houses, bridges, parks…
