a) Complete the following sentences with these words:
Polymers
Thermosetting
biodegradable
Thermoplastics
monomers
plastics
plastic bottles
softer
non-toxic
polymerization
non-corrosive
synthetics
oil
insulators
cheap
man-made
1. Most plastics are made from___________________.
2. Plastics are _____________________ materials.
3. The process by which we get a polymer is called________________________.
4. Plastics are made of _________________which are obtained form ________________.
5. Most plastics are ________________and are made from ________________.
6. Plastics are good _______________which makes them safe to use for casing electrical
equipment.
7. They are not__________________ and cannot be easily recycled.
8. ___________________________are generally strong and resistant to heat.
9. _______________can be heated, moulded and shaped various ways, lots of times.
10. Thermoplastics are usually______________ than thermosetting plastics.
11. Polythene (or polyethylene, or PET) is ideal for use in_______________________.
12. Plastics are __________________ and __________________-.
13. They are relatively____________________.
b) True or false. If the sentence is false write it correctly.
1. Plastics are bad insulators which makes them safe to use for casing electrical
equipment and for the covering on wires.
2. Plastics are non-corrosive and toxic.
3. They are relatively expensive, biodegradable and we can recycle them easily.
4. Plastic bottles are made of Acrylic because it´s very soft.
5. Plastics wash well and they are waterproof
6. There is one main type of plastic, Thermoplastic .
7. Thermoplastic are generally strong and resistant to heat.
8. Thermosetting plastics can be heated, moulded and shaped various ways, lots of
times.
What kind of Plastics is used to make these objects?
________
________________
____________________
________________
___________________
__________________
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