Materials of the future

Ceramics are ______ materials that are generally unaffected by heat.

• metallic

• elastic

• non-metallic

• plastic

What is the main source of raw materials for the plastics industri?

• rubber

• monomer

• cellulose

• crude oil

Glass is a ceramic used in windows because it is _____.

• brittle

• easily broken

• transparent

• strong

Porcelain is a ceramic used in electricity pylons because it is _____.

• white in colour

• an insulator

• dense

• a conductor

What is a natural polymer used to make paper?

• ethene

• PVA

• cellulose

• rubber

Ceramics are ______ and strong, but brittle. They are good _____ of heat and electricity, and they are very _____.

• hard, movers, unreactive

• hard, insulators, unreactive

• hard, conductors, reactive

Choose 2 processes that are exothermic reaction.

• when ammonium nitrate is dissolved in water, the mixture gets colder

• rubber reacting with sulphur, so it can be vulcanised

• when acid and alkali are mixed, the temperature changes from 21 degree celcius to 26 degree celcius

• when eggs are cooked, bonds in the protein molecules break

What is a natural polymers used to make tyres?

• rubber

• polyethene

• polypropene

• crude oil

Red mercury oxide (HgO) produces silvery mercury metal (Hg) and _____ gas when heated.

• Hydrogen

• Oxygen

• Carbonite

Bricks are also ceramics, and they are used to make buildings because they are _____.

• strong

• brittle

• rough