Materials and Components

Choosing the correct material for any particular task is essential for a manufacturing activity.
Materials are divided into:

• Raw materials ( natural and artificial ) and
• Processed materials ( artificial materials )

Natural materials

such as wood or stone exist in nature and we use them as they are. Example of these materials are wood, stone, sand, wool etc
Natural resources are split into 3 categories:

•Animal
•Vegetable
•Mineral

Artificial Materials

Artificial materials or Processed materials are those which have been transformed by man.
For example, iron is a natural material because we obtain it from mines. If we add carbon atoms to the iron, we get steel and steel is stronger that iron with better properties.
Even more, if we also add chrome, we get Stainless steel. It is also called corrosion-resistant steel So stainless steel is an artificial material, although we get iron from nature ( natural material

Exercises 1: Copy in your notebook and Complete the following table

natural------------artificial

iron-----------------steel