Materials

Are these sentences true or false?

a All types of wood float in water.

b No type of stone floats in water

• both are true

• a is true

• b is true

• both are false

The earliest use of nylon was in

• a women's clothing

• b toothbrushes

• c parachutes

• d guitar strings

The first bicycles had wheels made of

• a wood with iron tyres

• b iron with rubber tyres

• c iron with wooden tyres

Which of these metals is the hardest?

• a aluminium

• b copper

• c gold

• d iron

• e steel

During World War II (1939-45), scientists used dandelions to make

• a cardboard

• b paper

• c plastic

• d rubber

Which one of these materials did the Ancient Romans not have?

• a ceramic

• b concrete

• c glass

• d paper

Which of these metals is the heaviest?

• a aluminium

• b copper

• c gold

• d iron

• e steel