What are plastics primarily made of?

• Metals

• Polymers

• Glass

• Wood

Which of these is a naturally occurring polymer?

• Nylon

• Cellulose

• Polyethylene

• Teflon

What is the main ingredient in most synthetic plastics?

• Sand

• Crude oil

• Wood pulp

• Sugarcane

Which of these is a common thermoplastic?

• Epoxy resin

• Bakelite

• Polyethylene

• Vulcanised rubber

Which plastic is commonly used in water bottles?

• PVC

• PET

• ABS

• Polypropylene

Who invented the first fully synthetic plastic (Bakelite) in 1907?

• Alexander Parkes

• John Wesley Hyatt

• Leo Baekeland

• Wallace Carothers

What does 'thermoplastic' mean?

• It melts when heated and hardens when cooled

• It burns easily

• It cannot be recycled

• It does not change shape with heat

What is the main difference between thermoplastics and thermosetting plastics?

• Thermoplastics are biodegradable

• Thermosetting plastics cannot be reshaped once hardened

• Thermoplastics are stronger

• Thermosetting plastics melt easily

Which polymer is commonly used in non-stick cookware coatings?

• Polypropylene

• Polyvinyl chloride

• Polytetrafluoroethylene (PTFE)

• Polycarbonate

What is a key advantage of bio-plastics over conventional plastics?

• They are stronger

• They degrade faster

• They are made from crude oil

• They are more heat-resistant