IELTS Writing Correction Service
Writing Samples
Band 5.5

The diagrams below show the design for a wave-energy machine and its location. Summarise the information by selecting and reporting the main features and make comparisons where relevant.

The diagrams below show the design for a wave-energy machine and its location. Summarise the information by selecting and reporting the main features and make comparisons where relevant.
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The diagrams
illustrates
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illustrate
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 the structure of a
system
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 which produces electricity from
waves
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 and the locations it can be set up. As can be seen from the first diagram, the wave-energy machine is constituted of two main chambers linked with each other via two air passages. The
turbine
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 is placed in the upper
chamber
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while
Linking Words
 the lower
chamber
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 is partly submerged in the sea
wate
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water
. As regards its operation, first, the sea wave enters the lower
chamber
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 and raises the water level there to push the air up to rotate the
turbine
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 before finding its way out at the top of the
system
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. After
that
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,that
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 the sea wave withdraws from the lower
chamber
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, which creates a drop in pressure to suck the air back in from the opening in the top
chamber
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 to revolve the
turbine
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 and come down to the lower compartment of the
system
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. The cycle is
then
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 repeated and creates
continuous
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a continuous
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 force on the wings of the
turbine
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 to make it rotate and generate electricity. As is shown in the
second
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 diagram, the
energy generating
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energy-generating
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system
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 can be established close to the shore with smaller
waves
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 and lower installation
cost
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costs
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 accompanied by more modest electricity output.
Howerver
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However
, when it is erected far offshore where the
waves
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 are more powerful, the cost of construction is higher and proportional to the electric yield.
Overall
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, the diagram presents the working mechanism of a
power generating
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power-generating
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system
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 operating by
waves
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 and its possible locations which reveals the positive correlation between the energy output and the installation cost.

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Common mistake: Your writing should be 150-250 words.
Vocabulary: Replace the words system, waves, turbine, chamber with synonyms.
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Vocabulary: The word "diagrams" was used 4 times.
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Vocabulary: The word "waves" was used 6 times.
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