This is my Technology pp from unit 4

1. By: Núria Moreno

2. 1. Raw materials
2. Materials
2.1. Different types of materials
3. Manufactured goods
4. Properties of materials
4.1. Physical properties
4.1.1. Explanation (Physical properties)
4.2. Chemical properties
4.2.1. Explanation (Chemical properties)
4.3. Ecological properties
4.1.3. Explanation (Ecological properties)

3. * Raw
materials are substances that are
extracted directly from natural objects.
* Classification

4. * They are processed raw materials that are
ready for making any type of product.
* Processes
1. Physical process
2. Chemical process

5. *
Wood
* Metals
* Plastics
* Textiles
* Stones
* Ceramics

6. * Products made by humans to help or satisfy their
needs and improve their standard of living.

7. * There are three different types of properties:
1. Physical properties
2. Chemical properties
3. Ecological properties

9. * Electrical properties: Conductivity and insulation
* Thermal properties:
Conductivity
and insulation
Expansion and contraction
Fusibility
Welding

10. * Acoustic properties: Conductivity and
insulation.
* Magnetic properties: Magnetism.
* Optical properties:
Opaque
Translucent
Transparent

11. * Mechanical properties:
Mechanical strength:
Flexural strength Torsional
Compressive Shear strength
Tensile strength
(flexing, to curve) strength
strength
(stretching)
(sliding forces)
(twisting, to turn)(compressing,
to press)
Malleability
Elasticity
Hardness
Ductility
Plasticity
Toughness
Brittleness

12. * Others:
Porosity
Density
Permeability
Impermeability

13. * Oxidation

15. * Recyclable materials
* Toxic materials

16. * Biodegradable materials
* Renewable and non-renewable raw materials