C2.1

Question 1

How solid materials differ

Answer 1

Different properties such as melting points, strength, stiffness, hardness and density

Question 2

How do properties relate to the uses of matierals like plastic

Answer 2

Plastic polythene; flexible; plastic bags

Synthetic fibres; nylon; tough and water proof; climbing ropes

Rubbers; vulcanised; hard and flexible; conveyor belts

Question 3

How does the effectiveness of a product link to materials made to make it

Answer 3

Carrier bags; used to be paper now polythene because it’s stronger and Water proof

Window frames made of polychloroethene as its unreactive and doesn’t rot

Question 4

Natural and vulcanised rubber

Answer 4

Natural: very flexible & has a low melting point because little energy is needed to seperate molecules: strong covalent bonds

Vulcanised: rigid and hard to stretch as molecules won’t slide past each other
Need lots of energy to seperate