Materials Scientists

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Materials Scientists

• Making the right choices

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• How do we decide what material to use for what
  job?
• How do the properties of a material determine
  its use?

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Lets start withlooking at why we dont choose
certain materials
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Why would we not make

• a rubber bridge
• chocolate teapot
• a lead parachute

• a wooden light-bulb
• a glass tyre
• a concrete lifebelt

Try to use the following words in your
explanation Flexible Conductor Brittle Melti
ng point Density
These are physical properties of materials
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What would we use to make

• a bridge
• teapot
• a parachute

• a light-bulb
• a tyre
• a lifebelt

Try to use the following words in your
explanation Flexible Conductor Brittle Melti
ng point Density
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Material Properties

• Strength
• How much force is needed to break it
• Hardness
• How difficult it is to scratch
• Conductivity (heat and/or electricity)
• How well it lets the energy flow through it
• Stiffness
• How flexible it is
• Melting point
• The temperature at which it turns from solid to
  liquid
• Density
• How much mass it has for a given size

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• Some of these materials occur naturally
• An increasing number are man-made (synthetic)

Natural
Synthetic
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Draw a car and labelwith the material used
foreach part and why