Please enable JavaScript.

Coggle requires JavaScript to display documents.

Materials, There are several types of strength,compressive strength…

- - - - PorositySome materials can absorb or release liquids or gases Wood, somestones and ceramic matenals are porous (they contain tiny holes calledpores). This propem i s related to density: if a matenal is more porous,it's less dense
      - PermeablySome matenals allow water or other liquids to filter through them.An earthemcare iug containt liquid, or a wet cloth becomes wetbecause they' re made from permeable matenals.
      - DensityDensity is the relationship between the mass of an obiect and its volume.In the top photograph,the piece of wood weigths more than the sponge,but both pieces are of a similar volume.The wooden block has a higuer densitiy
      - ImpermeablySome materials dont´t allow water or other liquids to filter thorugth them.For instance glass is impermeable,so liquids stored in bottles don´t scape.Plastics and corck are also impermeable,or waterproof.
    - - Elasticity and plasticity
        
        Elasticity allows the material to brerutn his original form after a force that has changed its shape is removed,.
        
        Plasticity allows to be a permanently deformed.
      - Malleability and ductubility
        
        Maleability allows a materialto be spread into sheeets or films.Materials with this properties are malleable.
        
        Ductibility allows a material to be formed into filiaments,or wires.Materials with this properties are ductile.
      - Tougness and brittlenes
        
        Tougness is the resistance to breaking that a material shows when hit by something. ![images]
        
        Brittleness is the oppsoitte,when the material breaks easily
      - Hardness a hard material is not easilty scractched by other materials.The Mohs scale of minerals was created by the Austrian geologist Frederich Mohs.The materials are graded from 1 to 10 according to how hard they
    - - Thermal properties
        
        Expansion and contraction When the temperature increases,the materials expands. When the temperature decreases the material contracts
        
        FusibilitySome materials change from solid to liquid when their temperature is increased.
        
        Thermal conductivity.Thermal conductors are materials that conduct heat. Thermal insulators are the materials that dont´t conduct heat.
        
        WeldingSome materials can be used to weld two pieces of the same material together.
      - Acoustic properties
        
        Acoustic conductivitythe capacity of the materials to transmit the sound.
        
        Acoustic insulatorsSome materials don´t conduct sound well.
      - Magnetic properties
        
        MagnetismSome metals attracts other metallic materials
      - Optical properties
        
        TranslucentThese allow to ligth to pass throutgh them,but don´t allow objects behind them to be seen crearly.
        
        TransparentOther objects can clearly be seen through these materials
        
        OpqueOther obiects can't be seen througth them.These materials dont´t allow ligth to pass througth them.
    - - Electrical conductivity:some materials conduct electricity
      - Electrical insulation:some materials doesn´t conduct electricity
- - - - Source and characteristics:Oil,coal,natural gas,vegetable materials(cellulose) and animal proteins,made into cellophane ,PVC and rubber.
      - Uses:Turbing ,packaging,toys,containers,outer covering of electrical cables.
    - - Source and characteristics:Natural raw materials
      - UsesThread for making texiles with different uses
    - - Source and characteristics:From minerals wich are found in rocks.They are clasified into:
        
        Ferrous metals:wich contain iron
        
        Non ferrous metals:wich don´t contain iron
      - Uses:Structural components machines parts,tools,electrical components,fixures and fasteners.
    - - Source and characteristics Stone in differents forms and sizes(from large rocks to fine sand)processed into marble,slate,glass and plaster.
      - UsesConstruction materials and decorative objetcts and structures.
    - - Source and characteristics:Tree turnks
      - Uses:Furniture,floors,paper manufacturing,construction materials,wall panelling,decorative objects,tool handles.
    - - Source and characteristicsClay(transformed into ceramics by using a process called firing),earthenware and porcelain.
      - UsesConstruction,plates,bowls,sinks and decorative objects