WorksheetsC10b.5 Materials
Total questions: 15
Worksheet time: 8mins
What is the main component of soda-lime glass?
Calcium carbonate
Silicon dioxide
Magnesium oxide
Which material is added to soda-lime glass to make borosilicate glass?
Sodium oxide
Lead oxide
Boron trioxide
What happens to the structure of glass when it cools?
It forms regular crystal patterns
It retains a disordered structure
It becomes metallic in nature
Why is soda-lime glass not used for laboratory equipment?
It is too expensive
It is too soft
It softens at lower temperatures
What makes ceramics brittle?
Weak metallic bonding
Ionic charges that resist movement
Flexible polymer chains
What are clay ceramics mainly made from?
Polymer chains
Crystalline metals
Clay minerals and water
Which process hardens clay ceramics?
Cooling slowly
Heating in a furnace
Freezing under pressure
Why is the structure of a ceramic object rigid?
The atoms are arranged randomly
The layers slide past easily
The ions are fixed in place by strong forces
What is a composite material?
A pure material used for reinforcement
A blend of two materials for improved properties
A substance made entirely of polymers
Which of the following is a composite?
Glass
Steel
Fibreglass
Why is glass fibre reinforced polymer strong and flexible?
It uses air bubbles as spacers
The polymer provides flexibility and fibres give strength
It is made entirely of glass
Why are wood composites like MDF widely used?
They are made of hardwood
They are cheap and easy to shape
They resist rot better than metals
What is used in concrete to improve strength?
Steel rods or mesh
Glass particles
Plastic fibres
Why can ceramics withstand high temperatures?
They contain metal layers
They have strong ionic and covalent bonds
They have a low melting point
What is one reason for choosing composites over pure materials?
Composites are always biodegradable
Composites combine desired properties of both materials
Composites are made without heating
