TECHNOLOGICAL MATERIALS, TOOLS AND WOOD

RAW MATERIAL
1. Are products extracted directly from nature
2. Animals
3. Plants
4. Mineral origin
5. Air
6. water
NATURAL AND PROCESSED MATERIALS
1. Raw materials + Industrial process
  1. =
    1. processed materials
      1. synthetic
      2. artificial
2. A technological product is an object made using materials, designed by humans to meet a specific need
PROPERTIES OF THE MATERIALS
1. Mechanical properties
  1. Hardness
    1. The resistance of a body to being pierced or scratched by anothr body
  2. Material´s behabiour when subjected to stress and loads
  3. Mechanical Resistance
    1. Ability of a body to reset teh forces applied to whitouth breaking or changing in shape
  4. Thougness
    1. Body resistance to being changed, deformed or broken
  5. Brittleness
    1. Ability of an objet to break easily, without being deformed hardly at all
  6. Elasticity
    1. Ability of a material to return to its original shape after being deformed under external forces after they stop
  7. Plasticity
    1. Ability of a body to become permanently deformed without breaking, once its elactic limit has been exceed
2. Thermal properties
  1. How the materials behaves when subjeted to heat
  2. Expansion
    1. Increase of the size with its temperature rises
  3. Thermal Conductivity
    1. Ability to transmit heat
3. Environmental properties
  1. Impact of the material on the environment
  2. Toxicity
    1. How stron a poison or toxin is
  3. Environmental Hazard
    1. Level of toxi effect a contaminant has on an ecoystem
  4. Recycalbility
    1. Possibility of reusing a material for either the same purpose it was made for or a different one
  5. Biodegrability
    1. Ability to naturally decompose
TOOLS
1. Objects designed to carry out mechanical work and tasks
WOOD
1. Fibrous Material that trees are made of
  1. Cellulose
  2. ligning
2. Parts of the trunk
3. Types of Wood
  1. Non Resinous
  2. Resinous
4. Properties of Wood
  1. Hardness
    1. Soft and Easy to scratch
  2. Thermal and Electrical insulation
    1. Good insulator
  3. Flexibility
    1. Abailabilty to be deformed in the direction of the fibres without breaking
  4. Density
    1. Ratio of Mass to Volume
      1. Not dense
  5. Resistance
    1. Good for building
5. Forms of wood
  1. Natural Woods
  2. Prefabricated wood
6. Woodworking Tools
  1. Cutting Tools
    1. Basic Hand saws
    2. Machine Tools
    3. Hacksaws
  2. Impact Tools
    1. Hammers
    2. Mallets
  3. Assembly Tools
    1. Spanners
    2. Screwdrivers
  4. Shaving and drilling Tools
    1. Planning and Levelling
    2. Boring
    3. Machine Tools
    4. Smothing

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TECHNOLOGICAL MATERIALS, TOOLS AND WOOD

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	Criado por marco lorenzo mais de 4 anos atrás