Raw materials are substances extracted from nature and can be classified into animal, vegetable, and mineral origins. These raw materials are processed and transformed into processed materials that are used by humans to manufacture goods that satisfy needs and improve living standards. The technical materials used can be grouped into wood, metal, plastic, textiles, ceramics, and stone, with wood and stone being natural materials, metals extracted from mines, plastic derived from petroleum, and textiles including both natural and synthetic fibers.

1. It takes 20 days to
be descomposed
It takes more
than 100 years
It takes more
than 4000 years

2.  The objects we use in our everyday life are
manufactured from different types of materials.
Wood
Steel
Plastic
Glass
Wool
Marble

3.  Many of these materials are originated in nature.
Wood
Cork
Wool
Petroleum
Iron
Gold
Clay
Marble
Cotton

4.  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…

5.  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

6.  The materials resulting to these transformations are
called processed materials.
tree board
plastic
petroleum
sheep
wool
iron ore
steel block

7.  With the processed materials, humans create
manufactered goods.
board
plastic
wool
steel block
A manufactered goods
is any object created by
humans to satisfy their
needs and improve their
standard of living.

8.  With the processed materials, humans create
manufactered goods.
NATURAL
RESOURCES
RAW
MATERIALS
PROCESSED
MATERIALS
MANUFACTERED
GOODS
RECYCLED
MATERIALS

9.  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.

10.  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…)

11.  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.

12.  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…