Introduce el texto aquí

Introduce el texto aquí

1. Raw materials

   • Are products extracted directly from nature. They may be of plant, animal or mineral origin.

2. Natural and processed materials

   • Industrial processed are applied to raw materials, also know as natural resources, to turn them into processed materials. These processed materials are then used to make other, more complex objects.

3. Tools

4. The properties of materials

5. Wood and types of wood

   • Wood: is the fibrous material that trees are made of. It is made up of two main substances: cellulose and lignin.
   • Types of wood:
     • Non-resinous
     • Resinous

6. Properties of wood

7. Wood working tools

8. Forms of wood