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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. You should write at least 150 words.

The diagram given shows the design and the working way of a wave-energy machine and its proper locations. For the design, There are 2 chambers which are the bottom and the top part. As the water level increases, some of the airflow then passes through a gap resulting in the bottom turbine to rotate producing electricity by the generator but the unwanted airflow can either flow out of the machine or go back to the waves. For the top chamber, there is also an opening allowing airflow that also contributes to the electricity making both of the turbines rotate at the same time which leads to more powerful energy. Location options for the wave-energy machines depend on the waves if the waves are larger the output is, of course, higher making the installation cost more expensive but if the waves are smaller, the output is lower and the installation cost will be cheaper.
The diagram
This phrase/word (depending on the context) can be potentially replaced with :
given
This phrase/word (depending on the context) can be potentially replaced with :
shows
the design and the working way of a wave-energy machine and its proper locations.

For the design, There are 2 chambers which are the bottom and the top part. As the water level increases,
If the text is a generality, ‘of the’ is not necessary.
some of the
airflow then passes through a gap resulting in the bottom turbine to rotate producing electricity by the
Use a comma before ‘but’ if it connects two independent clauses (unless they are closely connected and short).
generator
This phrase/word is too simple and can be replaced with:
but
the unwanted airflow can either flow out of the machine or go back to the waves.

For the top chamber, there is
also
an opening allowing airflow that
also
contributes to the electricity making both of the turbines rotate at the same time which leads to more powerful energy. Location options for the wave-energy machines depend on the waves if the waves are larger the output is,
of course
, higher making the installation cost more expensive
This phrase/word is too simple and can be replaced with:
but
if the waves are smaller, the output is lower and the installation cost will be cheaper.
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IELTS academic The diagrams below show the design for a wave-energy machine and its location.

Academic
  American English
3 paragraphs
153 words
6.5
Overall Band Score
Coherence and Cohesion: 7.0
  • Structure your answers in logical paragraphs
  • ?
    One main idea per paragraph
  • ?
    Include an introduction and conclusion
  • ?
    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: 6.5
  • 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: 6.0
  • Use a variety of complex and simple sentences
  • Check your writing for errors
Task Achievement: 5.5
  • Answer all parts of the question
  • ?
    Present relevant ideas
  • Fully explain these ideas
  • ?
    Support ideas with relevant, specific examples
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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. You should write at least 150 words.