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WorksheetsPLASTICS 8 GRADE
Total questions: 20
Worksheet time: 16mins
Plastics are ________ in weight.
Very heavy
Light
Neglible
Heavy
Pastics are _________
Conductors
Semiconductors
Conductors at room temperature only
Insulators
There are __________ main groups of plastics
2
4
3
5
Thermosetting plastics :
Can be repeatedly remolded
Can not be melted and remoulded after forming
Are easier to produce
None of the above
Which of the following materials cannot be recycled?
aluminium
plastic bags
glass bottles
Cartoon Boxes
Plastics are renewable resources
True
False
Plastics corrode easily
True
False
Plastics are very combustible
True
False
Plastic is bad for environment because :
They are non biodegradable
The harm aquatic life
They are a toxin carrier
All of these
Plastic bags are not recyclable.
True
False
Plastic bottles should be recycled with the cap screwed on, rather than separating the cap before throwing it in the bin.
True
False
Some characteristic properties of plastic are:
Plastic is non-reactive and non-corrosive
Plastic is light, strong and durable.
Plastics are poor conductors of electricity
All above answers are correct
Which of the following is non-biodegradable
Paper
Cotton cloth
Wood
Plastic
thermoplastics and thermosets are the main classifications of plastics
True
False
Plastics differ from metals as they are:
Weaker
Harder to corrode
Softer
All the above
Thermo plastics cools to set in shape it was moulded; it can be reheated and remoulded
True
False
Plastics are available in many different colours and forms
True
False
Why are thermosetting plastics used for electrical fittings and pot handles because
The are black
They resist fire
They are tough
None of the above
Why is plastic replacing so many other materials?
Lighter weight
Ease of fabrication
Available is many different forms
All of the abobe
Plastics are now used a lot in the automotive industry because
Cars will be lighter and will use less fuel to propel them
It easier to clean
Easier to dispose of
None of the above
