# data[].attributes.headline
1.1  NATURAL AND PROCESSED MATERIALS. COMMON MATERIALS.

# data[].attributes.subject
1.1  NATURAL AND PROCESSED MATERIALS. COMMON MATERIALS.

# data[].attributes.body
Raw materials: are materials taken directly from nature that we process into other materials to make products with.

# data[].attributes.headline
1.2  NATURAL AND PROCESSED MATERIALS. COMMON MATERIALS.

# data[].attributes.subject
1.2  NATURAL AND PROCESSED MATERIALS. COMMON MATERIALS.

# data[].attributes.body
Natural materials: when we prepare or refine raw materials we obtain natural materials

# data[].attributes.headline
1. 3 NATURAL AND PROCESSED MATERIALS. COMMON MATERIALS.

# data[].attributes.subject
1. 3 NATURAL AND PROCESSED MATERIALS. COMMON MATERIALS.

# data[].attributes.body
Processed materials (also called manufactured material): when we processed raw materials they became procesed materials

# data[].attributes.headline
1. 4 NATURAL AND PROCESSED MATERIALS. COMMON MATERIALS.

# data[].attributes.subject
1. 4 NATURAL AND PROCESSED MATERIALS. COMMON MATERIALS.

# data[].attributes.body
Technical materials: any material used to construct an object is called technical material.

# data[].attributes.body
Hardeness: it is the resistence of a material to being scratched or pierced.
Thoughness: it is the resistence of a meterial to being the broken when we strike it.
Deformability: it is the ability of a meterial to be deformed.
Ductilllity: it is the ability of  a material to be stretched into a wire.
Mellability: it is the abillity of a material to be pressed or rolled into a sheet.

# data[].attributes.body
Wood:

# data[].attributes.body
Textiles:

# data[].attributes.body
Metals:

# data[].attributes.body
Plastic:

# data[].attributes.body
Construction material:

# data[].attributes.body
Hardness: this can vary a lot. It depends on the type of wood, the structure and the cutting direction.

# data[].attributes.body
Compressive strengh:  it`s better in the transverse direction than in the longitudinal direction.

# data[].attributes.body
Flexural strengh: it`s good but better in the transverse direction.

# data[].attributes.body
Toughness: wood is tough, so it`s used in sports equipement

# data[].attributes.body
Tensile strengh: it`s good in the longitudinal direction and poor in the transverse direction.

# data[].attributes.body
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 or to make tools with.

# data[].attributes.body
Density: wood is a light material. It has a lower density than water, which means that it floats.

# data[].attributes.body
Sound conductivity: good. This is why it`s used as a material to make certain musical instruments.

# data[].attributes.body
Man-made wood: enhances the properties of natural wood and reduces its price. The most important types of man-made wood are pylwood and chipboard.

# data[].attributes.body
Thermal and electrical conductivity: it`s very low. Wood is a good insulator of heat and electricity.

# data[].attributes.body
Tin:

# data[].attributes.body
Ferrous materials: depending on the percentage of carbon in the alloy, ferrous materials can be classified as: iron, steel and cast iron.

# data[].attributes.body
Wood derivates: are usually obtained from leftover wood. The most common ones are paper, cardboard and cork.

# data[].attributes.body
Cooper:

# data[].attributes.body
Zinc:

# data[].attributes.body
Aluminium: