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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. 5xoB
The first diagram illustrates the design and functioning of a wave-energy machine, which is a tool designed to convert the power of water into electricity. It's one of the principal methods of creating clean energy. As the illustration shows, the machine is divided in two chambers, positioned one on top of the other. Water enters into the bottom chamber, following the direction of waves: the space available is gradually occupied by water, which pushes the air out creating a flow that allows the turbine connected to an electricity generator to rotate, thus creating electrical energy. This type of machine, in order to function properly, can't be positioned everywhere, but only in specific places, as the second diagram shows. There are two location options: the first one, which is also cheaper in terms of installation costs, is to settle the wave-energy machine closer to the shore, where the water is still low. However, despite the advantages regarding costs, this solution unfortunately provides a low output in terms of electricity, since the waves near the shore are smaller and thus less powerful. In order to have larger waves and consequently a higher output, the wave-energy machine needs to be positioned where the water is deeper. Obviously, there is a downside to this, since the costs of installation are higher.
The
first
diagram illustrates the design and functioning of a wave-energy
You use this word too often, consider replacing it with
machine
, which is a tool designed to convert the power of
You use this word too often, consider replacing it with
water
into electricity. It's one of the principal methods of creating clean energy.

As the illustration
This phrase/word (depending on the context) can be potentially replaced with :
shows
, the
You use this word too often, consider replacing it with
machine
is divided
in two chambers, positioned one on top of the other.
You use this word too often, consider replacing it with
Water
enters into the bottom chamber, following the direction of waves: the space available is
gradually
occupied by
You use this word too often, consider replacing it with
water
, which pushes the air out creating a flow that
This phrase/word (depending on the context) can be potentially replaced with :
allows
the turbine connected to an electricity generator to rotate,
thus
creating electrical energy.

This type of
You use this word too often, consider replacing it with
machine
, in order to function
properly
, can't
be positioned
everywhere,
This phrase/word is too simple and can be replaced with:
but
This phrase/word (depending on the context) can be potentially replaced with :
only
in specific places, as the second diagram
This phrase/word (depending on the context) can be potentially replaced with :
shows
. There are two location options: the
first
one, which is
also
cheaper in terms of installation costs, is to settle the wave-energy
You use this word too often, consider replacing it with
machine
closer to the shore, where the
You use this word too often, consider replacing it with
water
is
still
low.
However
, despite the advantages regarding costs, this solution unfortunately provides a low output in terms of electricity, since the waves near the shore are smaller and
thus
less powerful.

In order to have larger waves and
consequently
a higher output, the wave-energy
You use this word too often, consider replacing it with
machine
needs to
be positioned
where the
You use this word too often, consider replacing it with
water
is deeper.
Obviously
, there is a downside to this, since the costs of installation are higher.

IELTS academic The diagrams below show the design for a wave-energy machine and its location.

Academic
  American English
4 paragraphs
217 words
6.0
Overall Band Score
Coherence and Cohesion: 7.0
  • Structure your answers in logical paragraphs
  • ?
    One main idea per paragraph
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    Include an introduction and conclusion
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    Support main points with an explanation and then an example
  • Use cohesive linking words accurately and appropriately
  • ?
    Vary your linking phrases using synonyms
Lexical Resource: 5.5
  • Try to vary your vocabulary using accurate synonyms
  • Use less common question specific words that accurately convey meaning
  • Check your work for spelling and word formation mistakes
Grammatical Range: 6.5
  • Use a variety of complex and simple sentences
  • Check your writing for errors
Task Achievement: 7.0
  • Answer all parts of the question
  • ?
    Present relevant ideas
  • Fully explain these ideas
  • ?
    Support ideas with relevant, specific examples
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