properties of materials

Question 1

what 3 types of materials are there?

Answer 1

1. natural
2. synthetic
3. raw

Question 2

what different properties can materials have ?

Answer 2

• melting points
• boiling points
• strengths
• conductivity
• density
• harshness
• appearence
• cost

Question 3

list some properties of metals :

Answer 3

• strong
• hard
• high density
• not flexible
• good conductivity
• high melting point

Question 4

what are some uses for metals ?

Answer 4

Buildings, kitchen utensils, engines, electrical wiring eg copper, aluminium, Iron

Question 5

what are some properties of plastics?

Answer 5

• strong : can be hard or flexible depending on the plastic
• low density
• poor conducters of electricity and heat
• low melting point

Question 6

name some uses for plastic

Answer 6

making plastic chairs, bottles, window frames, doors, cling film, covers for electronics eg. PVC, Polythene, Babelite

Question 7

what are some properties of fibres?

Answer 7

• flexible (not strong or hard)
• low density
• poor conducter of electrictity
• low melting point

Question 8

name some examples of uses for fibres

Answer 8

Clothes, curtains, carpets eg. Cotton, Silk,Nylon

Question 9

what are some properties of ceramics?

Answer 9

• strong and hard
• high density
• not flexible
• unreactive
• poor conducter of electricty
• high melting point

Question 10

list some uses for ceramics

Answer 10

Bricks for building, crockery (plates/ bowls), cups eg. pottery, china

Question 11

what are some advantages that the use of modern synthetics over tradtitional materials?

Answer 11

• it is cheaper
• they have better properties
  for example nylon replaced linen in the manufacturing of table clothes and napkins because linen takes long to make

Question 12

what are chemical properties

Answer 12

• with water
• with air
• with other materials