TECHNOLOGICAL MATERIALS, TOOLS AND WOOD

TECHNOLOGICAL MATERIALS, TOOLS AND WOOD

1. RAW MATERIAL

   • Are products extracted directly from nature
   • Animals
   • Plants
   • Mineral origin
   • Air
   • water

2. NATURAL AND PROCESSED MATERIALS

   • Raw materials + Industrial process
     • =
       • processed materials
         • synthetic
         • artificial
   • A technological product is an object made using materials, designed by humans to meet a specific need

3. PROPERTIES OF THE MATERIALS

   • Mechanical properties
     • Hardness
       • The resistance of a body to being pierced or scratched by anothr body
     • Material´s behabiour when subjected to stress and loads
     • Mechanical Resistance
       • Ability of a body to reset teh forces applied to whitouth breaking or changing in shape
     • Thougness
       • Body resistance to being changed, deformed or broken
     • Brittleness
       • Ability of an objet to break easily, without being deformed hardly at all
     • Elasticity
       • Ability of a material to return to its original shape after being deformed under external forces after they stop
     • Plasticity
       • Ability of a body to become permanently deformed without breaking, once its elactic limit has been exceed
   • Thermal properties
     • How the materials behaves when subjeted to heat
     • Expansion
       • Increase of the size with its temperature rises
     • Thermal Conductivity
       • Ability to transmit heat
   • Environmental properties
     • Impact of the material on the environment
     • Toxicity
       • How stron a poison or toxin is
     • Environmental Hazard
       • Level of toxi effect a contaminant has on an ecoystem
     • Recycalbility
       • Possibility of reusing a material for either the same purpose it was made for or a different one
     • Biodegrability
       • Ability to naturally decompose

4. TOOLS

   • Objects designed to carry out mechanical work and tasks

5. WOOD

   • Fibrous Material that trees are made of
     • Cellulose
     • ligning
   • Parts of the trunk
   • Types of Wood
     • Non Resinous
     • Resinous
   • Properties of Wood
     • Hardness
       • Soft and Easy to scratch
     • Thermal and Electrical insulation
       • Good insulator
     • Flexibility
       • Abailabilty to be deformed in the direction of the fibres without breaking
     • Density
       • Ratio of Mass to Volume
         • Not dense
     • Resistance
       • Good for building
   • Forms of wood
     • Natural Woods
     • Prefabricated wood
   • Woodworking Tools
     • Cutting Tools
       • Basic Hand saws
       • Machine Tools
       • Hacksaws
     • Impact Tools
       • Hammers
       • Mallets
     • Assembly Tools
       • Spanners
       • Screwdrivers
     • Shaving and drilling Tools
       • Planning and Levelling
       • Boring
       • Machine Tools
       • Smothing

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