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Metals that have iron are called ferrous metals, and metals that not have iron in there composition are called non-ferrous metals.
FERROUS METALS:
Ferrous metals can be classfied as: Iron, Steel and Cast iron.
NON-FERROUS METALS:
There are lot of non-ferrous metallic materials, the most useful ones are Copper, Tin , Aluminium and Zinc.

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Wood products include man-made and Wood derivatives:
MAD-MADE:
Plywood: this formed by an odd number of thin wood layer.

Chipboard: is optained from wood chips that are mixed with resing and depressed.

WOOD DERIVATIVES:
Paper: this obtained by forming a paste out of Wood and plant fibres(pulp)

Cardboard: is made by compressing several layers of paper while, it is wet to thicken it and produce a heavier texture.

Cork: is obtain from the barck of the cork oak

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TENSILE STRENGTH:
It is good in the longitudinal and por in the transverse direction
COMPRENSIVE STRENGTH:
It is better in the tranverse direction that in the longitudinal direction.
FLEXURAL STRENGTH:
Is better in transverse direction
HARDNESS:
This can vary a lot. It depends on the type of wood, the structure and the cutting direction.
TOUGHNESS:
We use wood in the sports equipment, like hokey stiks, because wood is tough.
THERMAL AND ELECTRICAL CONDUCTIVITY:
It is very low.Wood is a good insulator of heat and electricity.
SOUND CONDUCTIVITY:
It is good.This is why it is used as a material to make certain musical instruments.
COLOUR:
Different wood have differnt colours: they can be White, Yellow, Brown...
DENSITY:
Is a light material, it has a lower density tan wáter.

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We prepare the raw materials to obtain natural materials.
EXAMPLES:
Wood-cotton

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Are materials taken directly from nature ,then we transform this materials into others to do products.
EXAMPLES:

Plastic-wool

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WOOD: pine , oak & beech....
METALS: iron , gold & silver....
PLASTICS: rubber
TEXTILES: wool, cotton & silk...
CONSTRUCTION: marble, slate & clay....

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There are mechanical properties 5 types:
HARDNESS: this is the resistance of a material to being scratched or pierced.
TOUGHNESS:
This is the resistance of a material to being broken when we strike it.
DEFORMABILITY:This is hte ability of a material to be deformed.
DUCTILITY:
This is the ability of a material to be stretched into a wire.
MALLEABILITY:
This is the ability of a material to be pressed or rolled intp a sheet..

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The process materials are when we process raw materials.
EXAMPLES:
products like clothes