# data[].attributes.body
We prepare or refine raw materials to obtain natural materials.

# data[].attributes.body
When we process raw materials they become processed materials(also called manufactured materials).

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

# data[].attributes.body
Paper:is obtained by forming a paste of wood and plant fibres that is mashed,dryed and pressed.
Cardboard:is made by compressing several layers of paper while is wet to thicken it and produce a heavier texture.
Cork:is obtained from thr bark of the cork oak.It's waterproof,lightwheight and very good insulator

# data[].attributes.body
Plywood:it's formed by thin wood layers called veneers that are laid together on top of each other and bonded with adhesive
Chipboard:Is obtained from wood chips that are mixed with resine and then are pressed

# data[].attributes.body
Natural wood:pine,beech,oak,cherry ebony,etc.
Man-made wood:Plywood and chipboard
Derivatives:Paper,cardboard and cork

# data[].attributes.body
Natural:Latex
Synthetic:PVC,melamine,silicone,polyethylene,polypropylene,nylon...

# data[].attributes.body
Natural:Animal or plant
Synthetic:lycra,nylon,viscose,polyester,acrylic,etc.

# data[].attributes.body
1.Hardness:This is the resistance of a material to being scratched or pierced.

2.Toughness:This is the resistance of a material to being broken when we strike it.
3.Ductility:Is the ability of a material to be stretched into a wire

4.Deformability:This is the ability of a material to be deformed.

5.Malleability:This is the ability of a material to be pressed or rolled into a sheet.

# data[].attributes.body
Stone:Marble,slate,clay,etc.
Binders:plaster,cement,concrete,etc.
Ceramic:bricks,tiles,stoneware,porcelain,glass,etc.

# data[].attributes.body
Tensile strenght(resistance to stretching):It's good in the longitudinal direction but poor in the transverse direction.
Compressive strenght(resistance to being crushed):It's beter in the transverse direction than the longitudinal.
Flexural strenght(resistance to bending):it's good but better in the transverse direction.
Hardness:This can vary a lot.It depends on the type,structure and cutting direction.
Toughness:wood is tough
Thermal and electrical conductivity:It's very low.It's a good insulator for electricity and heat.
Sound conductivity:It's good,that's why is used to make musical instruments.
Colour:Different woods have different colours.
Density:Wood is a light material,so it floats.

# data[].attributes.body
MECHANICAL PROPERTIES
Hardness:it doesn't scratch easily.
Malleability:we can press it into sheets and it won't break.
Ductility:we can stretch it into wires
Toughness:it's resistant to hits.
THERMAL PROPERTIES
-It is a good conductor of heat.
-It expands with high temperatures and contracts with low temperatures.
ELECTRICAL AND MAGNETIC PROPERTIES
-It's a very good conductor of electric current and some of them have a magnetic behaviour.
OTHER PROPERTIES
Many of the metals rust easily,are sound conductors,are solid at room temperature and are heavy and dense

# data[].attributes.body
Ferrous metals:Iron,steel,cast metals,etc.
Non-ferrous metals:Zinc,gold,silver,copper,chromium,nickel,aluminium,tin,lead,etc.

# data[].attributes.body
Iron:it's a metal with less than 0,1% of carbon.It's very brittle,so it doesn´t has a lot of applications.
Steel:it's a metal with a % of carbon between 0,1 and 2%.It's stronger than iron and very cheap,so it's widely used in industry.
Cast iron:it has a percentage of carbon between 2% to 6,67%.It is used in making engines,tools,street lights,etc.

# data[].attributes.body
Copper:this is a bright red-coloured metal.It's one of the most ancient metals that human have used.It's very ductile.
Tin:it's a silver coloured shiny metal that is really resistant to corrosion.It's non-toxix,and if we combine it with copper we can make bronze,an alloy that's almost as hard as metal.
Aluminium:this is a white shiny cheap.It's very light,non-toxic and easy to shape.
Zinc:this is a bluish-white metal.It's malleable and ductile.It's used to protect other metals using it as a coat.