The picture illustrates the procedure of converting rain water into usable household water in a city located in Australia. In overall, there are five main steps, in which water undergoes two different processes: physical and chemical.
In the first step, rain water is collected from the roof in a rainy day before being drained into a tank filled with pebbles to experience the first physical treatment. Those small stones will act as an absorbance factor, thus eliminating a huge amount of dust in raw water. After some times of being filtered, preliminary water is transferred into a reservoir in the third step to prepare for the second treatment, the chemical one.
In the fourth stage, water is treated with some dedicated chemical substances to complete its treatment process. The water is then ready to put into use through a system of separate water pipes that supply drinking water to each household in town.
The picture illustrates the procedure of converting rain
water
into usable household
water
in a city located in Australia. In
overall
, there are five main steps, in which
water
undergoes two
different
processes: physical and chemical.
In the
first
step, rain
water
is collected
from the roof in a rainy day
before
being drained
into a tank filled with pebbles to experience the
first
physical treatment. Those
small
stones will act as an absorbance factor,
thus
eliminating a huge amount of dust in raw
water
. After
some
times of
being filtered
, preliminary
water
is transferred
into a reservoir in the third step to prepare for the second treatment, the chemical one.
In the fourth stage,
water
is treated
with
some
dedicated chemical substances to complete its treatment process. The
water
is then ready to put into
use
through a system of separate
water
pipes that supply drinking
water
to each household in town.
4Linking words, meeting the goal of 7 or more
10Repeated words, meeting the goal of 3 or fewer
0Mistakes