Lesson 2

• What are the two categories of material properties?

  Physical properties and mechanical properties
• What do physical properties describe?

  How a material behaves under specific conditions
• What do mechanical properties describe?

  How a material behaves when worked or shaped
• What is fusibility in terms of physical properties?

  How easily a material becomes a liquid
• Why is fusibility important in solder?

  It allows solder to melt with heat
• What is electrical conductivity?

  How easily electrical energy passes through a material
• Why is gold used in electrical components?

  It is an excellent conductor of electricity
• What is thermal conductivity?

  How easily heat energy passes through a material
• Why is aluminum popular for pots and pans?

  It has high thermal conductivity
• What does resistance to moisture mean?

  A material's ability to prevent moisture penetration
• What is absorbency in materials?

  A material's ability to soak up and retain liquids
• Why are natural fibers like cotton comfortable to wear?

  They have high absorbency for perspiration
• How do synthetic fibers compare to natural fibers in absorbency?

  Synthetic fibers are virtually non-absorbent
• What does hardness measure in materials?

  The resistance to cutting and indentations
• What is strength in terms of material properties?

  How a material withstands heavy loads without breaking
• What is density?

  Mass per unit volume of a material
• Why is expanded polystyrene used in packaging?

  It has low density for protection
• What does toughness measure in materials?

  The energy a material can absorb without breaking
• What is malleability?

  The ability to be hammered or shaped without breaking
• What is ductility?

  The ability to be drawn into a long length
• Why is copper used for electrical cables?

  It is a good conductor and ductile
• What does elasticity measure in materials?

  The ability to stretch and return to original shape
• What is the opposite of toughness?

  Brittleness
• What are the key mechanical properties of metals?

  • Hardness
  • Toughness
  • Malleability
  • Ductility
  • Elasticity
  • Strength
  • Density
• What should you do for the scavenger hunt task?

  • Find products with various mechanical properties
  • Aim to tick every box