[bai-giai-den-roi-cham-com]-Luyen-doc-reading-voi-bo-giao-trinh-oxford-level-5

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Plastics are materials that people make from chemicals.
Most plastics are made from petrochemicals from oil.
Some plastic objects are hard, but others are soft.
Some plastics are fibers or liquids. People use plastics
to make lots of different products.
We can put hot, liquid plastics into a mold. The plastic
cools and becomes an object with the same shape as
the mold. This is how we make toys and plastic bottles.
Plastic shopping bags are made from a plastic called
polythene. People throwaway a lot of polythene waste.
That's bad because scientists think it could take
hundreds of years for polythene to decompose!
Nyon
Nylon is a soft plastic.
It was invented in 1935.
We can put nylon into
molds to make sneakers.
We make fibers out of
nylon, too. People weave
them with cotton or wool
to make different types
of clothes. Nylon fibers
are very strong, so we use
nylon to make parachutes.
Ac ylic
People use a type of
plastic called acrylic to
make paints. When acrylic
paints are wet, you can
mix them with water.
When they're dry, they
become waterproof.
We use acrylic for lots
of other things, like the
windows in planes and
the fur on teddy bears.
Go to pages 44- 45 for activities.