Extra

Question 1

thermoplastic

Answer 1

● Chemical neutrality (unreactive)
● Elasticity
● Lightness
● Resilience
● Corrosion resistance

Question 2

thermosetting

Answer 2

● Hardness
● Resilience
● Heat resistance
● Stiffness

Question 3

Ceramics

Answer 3

● Hardness
● Low electrical conductivity
● Wear resistance
● Heat resistance
● Corrosion resistance

Question 4

Wood and Modified Wood:

Answer 4

● Varnish
● Paint
● Treatment with a special protective coating like an alkaline solution that contains
copper (Turns the wood bluish).
● Subjecting it to high temperature

Question 5

Ceramics (modifications)

Answer 5

● Heating
● Coating them in enamel, a protective coating
● Avoiding exposing them to acids, bases and thermal shock
● Note: Ceramics are generally very durable. They are even found in archeological
digs.

Question 6

Metals and Alloys:

Answer 6

• Coating the metal with treatments.
  ● Metallic Coatings: zinc (galvanization), chrome, gold, silver, nickel, aluminum,
  lead
  ● Other Coatings: paint, enamel, grease, resin
  ● Exposing to high heat to make the material harder like steel

Question 7

Plastics:

Answer 7

● Protecting the plastic with waterproof coatings
● Adding antioxidants like carbon to prevent oxidation
● Adding pigments that absorb UV rays