9E Use of materials

What does 'brittle' mean?

• Soft
• Easily breakable
• Easily bendable
• Tough

Which of these properties do ceramics possess?

• Light
• Very fragile
• Strong hardness
• Flexible

What is a disadvantage of ceramics?

• Ceramics are tough. 
• Clay is easy to obtain.
• They can be painted.
• They can fracture easily.

Because of their strong bonds, ceramics are...

• Electrically resistant
• Elastic
• Heat resistant
• Magnetic

Are ceramics...

• Good insulators
• Good conductors

Which of these objects is a ceramic?

• Brick
• Pylon
• Water bottle
• Tarmac

Large molecules made up of smaller molecules.

• monomer
• polymer
• hydrocarbon
• plastic

Which is not an example of a natural polymer 

• silk 
• wool 
• cotton 
• plastic

The process by which polymers and plastics are made 

• polymerization 
• vulcanization 
• PVA
• PMMA

What is a polymer?

• a group of atoms
• a long chain molecule with identical group of atoms
• a long chain of molecules
• a long chain of different atoms