The diagrams below show a structure that is used to generate electricity from wave power.
The diagrams graphically demonstrate how electrical energy is produced in two steps by taking advantage of the wave power.
Turning to the diagram A, on the ocean floor a chamber is constructed, and the chamber is situated beside the cliff or the sea wall. Whenever the wave advances, the chamber guides the wave towards a vertical column in which a turbine is located. Thence, the movement of the water flow increases the pressure of the air at the bottom of the column. In turn, an air flow takes shape inside the column, and this flow rotates the turbine on counterclockwise. Afterwards, the axial rotation of the turbine produces electricity.
Looking at the diagram B, the energy reduction of the wave brings about retreating the water flow and the wave returns back into the inlet of the chamber. This phenomenon lessens the air pressure at the bottom of the column. Therefore, the air inside the column is sucked out and then a new air flow, which revolves the turbine on anticlockwise, commences to move down. As a result the electricity is generated.
- Some people believe that money is the most important factor for achieving happiness. However, others believe that happiness has nothing to do with money. Do you agree or disagree? 87
- You should spend about 20 minutes on this task.The maps below show the changes that have taken place at the seaside resort of Templeton between 1990 and 2005.Summarize the information by selecting and reporting the main features, and make comparisons wher 70
- More and more city workers are deciding to live in the country and travel into work every day. The result is increased traffic congestion and damage to the environment. What measures do you think could be taken to encourage people not to travel such long 70
- Some people believe that competitive sports, both team and individual, have no place in the school curriculum. How far do you agree or disagree?Give reasons for your answer and include any relevant examples from your own knowledge or experience.Write at l 60
- The graph below shows in percentage terms the changing patterns of domestic access to modern technology in homes in the UK. Summarize the information by selecting and reporting the main features, and make comparisons where relevant. 63
the wave returns back into the inlet of the chamber.
the wave returns the inlet of the chamber.
Read a sample and see how to use verbs:
http://www.testbig.com/ielts-writing-task-i-essays/diagrams-show-struct…
Attribute Value Ideal
Score: 6.5 out of 9
Category: Good Excellent
No. of Grammatical Errors: 1 2
No. of Spelling Errors: 0 2
No. of Sentences: 10 10
No. of Words: 181 200
No. of Characters: 856 1000
No. of Different Words: 94 100
Fourth Root of Number of Words: 3.668 4.0
Average Word Length: 4.729 4.6
Word Length SD: 2.706 2.4
No. of Words greater than 5 chars: 64 60
No. of Words greater than 6 chars: 46 50
No. of Words greater than 7 chars: 29 40
No. of Words greater than 8 chars: 17 20
Use of Passive Voice (%): 0 0
Avg. Sentence Length: 18.1 21.0
Sentence Length SD: 6.625 7.5
Use of Discourse Markers (%): 0.2 0.12
Sentence-Text Coherence: 0.424 0.35
Sentence-Para Coherence: 0.559 0.50
Sentence-Sentence Coherence: 0.096 0.07
Number of Paragraphs: 3 4