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Practice Exercise for IELTS Diagrams

Below is a practice exercise to help you improve your IELTS diagrams. You need to fill in the gaps in the paragraph below with the appropriate article or correct form of the noun (a / an / the / nothing / plural). These are the most common mistakes that students make with IELTS diagram descriptions.

The  diagram below shows how hydro-electric power is generated.

ielts diagram practice

Source: the diagram above was not designed by IELTS Liz. Source unknown.

Questions 1-10

This exercise is to develop accuracy with grammar. Complete the paragraph below by either adding an article (a/an/the/nothing) or by having a plural noun. Here is an example to help you understand :


(1) ……..(Electricity)  is generated by (2) ………..(water)  passing through(3) ………….(turbine).  Answers

  • Electricity (no article and no plural)
  • water (no article and no plural)
  • a turbine (we must use an article here as this is a countable noun and we are introducing it for the first time)

Diagram Exercise

It can be seen that (1) ……………………(evaporation) is caused by (2) ………………….(sun’s heat) and results in (3) …………….(cloud formation) which later leads to (4) …………….. (rain). As rain falls, it is collected in (5) ………………… (reservoir) which is controlled by (6) ………….(dam). The flow of the water from (7) ……………(dam), is controlled by (8) ………….. (valve) which opens and closes to allow water to flow to (9) ………….. (turbine) below for (10) ………… (production) of electricity.


Click below to reveal the answers:

It can be seen that (1) evaporation is caused by (2) the sun’s heat and results in (3) cloud formation which later leads to (4) rain. As rain falls, it is collected in (5) a reservoir which is controlled by (6) a dam. The flow of the water from (7) the dam, is controlled by (8) a valve which opens and closes to allow water to flow to (9) a turbine below for (10) the production of electricity.



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  1. http://Abhishek%20Chakraboty says

    Thank you very much mam for the work you are doing for all of us. I have learned so many things from here and improved me a lot.
    Here I am posting my writing and am expecting that you will rectify my mistakes.

    The diagram illustrates how hydro-electric power is being generated through various processes. Overall, the sea water forms cloud through evaporation and it is collected in a reservoir after raining.The flow of water is being converted through various processes to produce electricity.

    Initially, the rain water is collected in a reservoir which is controlled by the dam and a valve is there to open and close the dam depending on the water flow. From this point the water is directed towards turbine to make hydro electric power. The excess water is backed to reservoir being pumped.

    After the generation of electricity, it is directed straight through high voltage cables to the transformer station. From there the electricity travels into the underground cables and reaches to the hospitals and schools in the town.

  2. http://Oscar says

    Hi Liz,
    great page! Thank you very much for doing this.
    I´m quite sure there´s a “for” missing in the text just before (10). The sentence made no sence to me until I read the answer where the “for” suddenly appeared.

    Kind regards

  3. http://Rustam%20Assanbayev says

    The answer:
    The diagram illustrates the process of generating hydro-electric power.
    Overall, the process consists of circulation of liquid and gas transferring through high voltage cables to various points.
    To begin with, water evaporates from the sea due to the sun`s heat, and after, as rain falls water is collected in the reservoir. The movement of the water is regulated by the valve of the Dam where the collected water goes to the turbine for producing electricity.
    The next step is the produced electricity is directed through the high voltage cables to the transformation station. Finally, it is transferred via the underground cables to houses, schools, factories, and hospitals.

  4. http://Khairi%20Juwaidi%20Bin%20Mansor says

    Hello Ms. Liz. I already done the Ielts today.. And i use all your study… And i think i have done great just now. .. Thanks a lot.. And pray for me for the result.. 13 days from now😊
    KJ, Malaysia

  5. http://Ayar says

    H i LIZ

  6. http://Nadia says

    Dear Liz,
    I would like to thank you for your fabulous work for us as a students . Acutually , I have a complicated trouble in using of articles ( a , an , the ) . I will appreciate if you can make a video lesson about how to use them in correct way .
    Yours Sincerely

  7. http://mag says

    Hi Liz,when giving information about a diagram -take for instance the one on generation of hydro-electric power where the distribution of the electricity by underground cable is to two structures not labelled and then to schools and hospitals.Though this structures are not named but we know what they look like,can the assumed names be written without having it on the diagram.

    • http://Liz says

      If the structures are easily identifiable, you can write them. However, although I can see one is obviously housing, the other is not so clear. So, you could refer to housing and other buildings. You can only assume when the image is evidently symbolic of something.
      All the best

  8. http://Rozita says

    Dear Liz,
    I was watching an important example of T1 about “the water usage in the average Australian home during the years 2004” which was the combination of the diagram and the graph. Unfortunately , I missed it suddenly and could not find it again. It was explaining the steps of writing clearly.
    Please help me to have this lesson via direct link. This is the weakness of me in T1 how to mix two sources of data.

  9. http://Ismail says

    Thanks for you advice Liz I will use it

  10. http://Sherif%20Mahmoud says

    Hi Liz, thank you very much for you great help to all of us , I am looking forward to meet you soon to thank you again.
    would you please have a look on this?
    Yours , Sherif .
    the underlying diagram shows how electricity is generated from water.
    Overall this process is divided into two parts, generation and distribution. The generation starts when sun heat evaporizes sea water , leading to formation of huge clouds rich in rain water ,which falls later in a reservoir sealed by a dam and close and open valve.
    The water is allowed to flow through the valve to pass into a turbine and a pump, to produce electricity and to bring the water back into the reservoir ,respectively.
    the electrical current which is generated from the first step will be transferred via high voltage cables to transformation stations to modify its strength before sending it to homes, schools, hospitals and other facilities.

  11. http://Ismail says

    Hi Liz sorry for disturbung I also would like read your comment about my writing
    This diagram shows how to produce electricity from the water.
    First of all sun rises and makes saline water from sea evaporate.In the sky vapour condenses and converts to the clouds.If clouds full rain occurs.Then rain water collects into the artificial reservoir,which has dam to protect water from overflowing.The valve which is installed behind the dam is used to control the amount of water.Next water flows through the valve to the turbine.Simultaneously pump which is installed beneath turbine pumps water again to the reservoir and causes the water to circulate.This process causes to produce electricity.After that electricity flows through high voltage cables to the power towers.Finally after passing power towers electricity is transferred for consuming.

  12. http://jannah says

    hi lizz




    • http://Liz says

      Sorry I do not offer free marking or paid marking or private lessons. You will need to find a local teacher or a teacher online to help you.
      All the best

  13. http://Dalis says

    Hi LIz,
    Please kindly give me comment on the Writing Task 1

    The diagram below illustrates the process of producing electricity through hydro-power dam and how it is distributed to different places.

    The graph clearly presents that the sun’s head evaporates sea water into the air and then it produces rain. The rain water drops into a big reservoir where it has been built to store water. At the dam there is a valve which is used to open or close the water flow. When the valve is opened the water drops down and makes turbine turn then pumps the water up to reservoir. The process goes as cycle after it transforms to electricity. The electricity power run through the High voltage cable to the transformation station.
    At the station electricity has been distributed through underground wires where electricity is distributed to households, hospital and school.

    Overall, another way to produce electricity is through hydro-power dam system which is environmental friendly and cost effective in long term if we compare to using fuel to generate electricity.

  14. http://salama%20zewail says

    Hi Liz,
    first, I’d like to thank you for this amazing site and for all your work. I am preparing for the exam and i hope, I can get 7.5 score.
    this is my writing sample and i wish to have the time to read it and give me your advice.

    The diagram illustrates the process of producing electricity from water, transferring into stations and redistribution into different places.
    Over all, the process depending on keeping water behind a dam then directing it to the turbines where electricity is generated, after that transferring into transformer station occurs to allow redistribution.
    firstly,the sun rays heats the sea water producing water vapor that forms clouds. the clouds get cool and so, rain occurs. A dam is used to keep the rain water till reaching a certain level where a valve is open to allow water passes into the turbines. the water moves the turbines generating electricity while the remaining water is transported back through a big tube into a pump so, it can be pumped into the water reservoir and this allow re-utilization in the process again. Electricity is then transferred through a high voltage cables to a transformer station where it can be redistributed to houses, factories, schools and hospitals by an underground wires.

    • http://Liz says

      There are issues which you will need to fix immediately.

      1. You have put overview information in your introduction. Just paraphrase the information given by IELTS: The diagram illustrates the in which hydro-electric power can be generated”. It is a direct paraphrase and nothing more.
      2. Grammar “the process depending” = the process depends”. There are quite a lot of grammar errors in this report. Certainly too many errors to get band 7 in grammar. However, that doesn’t mean you can’t get 7 overall. You just need to work on your task achievement and paragraphing.
      3. Body paragraphs – you won’t get a good score unless you have two or three body paragraphs. Usually it is just two. Then must be clear to see so keep one line empty between your paragraphs.
      All the best

      • http://salama%20zewail says

        Hi Liz,
        thank you for your reply. This is my writing sample after correction. I hope you can read it. thank you.

        the diagram illustrates the process by which hydro_electrical power is produced and redistributed.

        In general, Electricity is produced by the passage of water through the turbines. After that, It is transformed through cables into transformer stations for redistribution.

        From the diagram, It is clearly noticed that sun heats evaporize the sea water. this evaporation gets cool to form cloud that leads to rain. Rain is kept in a reservoir by a dam. Upon reaching a certain level, the water behind the dam is allowed to pass into the turbines by the use of control valve. Moving of the turbines produces electricity and the water is pumped back to the reservoir.Electricity is transformed into transformer station through high voltage cables where it can be redistributed through an underground cables to schools, factories, hospitals and houses.

        • http://Liz says

          It’s good. But don’t forget to to divide your body paragraph into two and to use appropriate linking devices (Overall, then, following that, the next stage is when…)

  15. http://Fernando%20Bernardo says

    Hello Liz how are you?

    Thanks for your blog it is very helpful.

    Below is my exercise.


    The diagram show step by step how is the process to generate electricity from water source.

    First it is necessary the sun to heat the ocean, the sea water evaporate and turn into dark clouds, after that the rain fall and fill the dam, following that the rainwater go through pipes to turbine and finally generate energy, then the water is sucked by a pump and return back to the dam to be reutilizes creating a cycle.

    In addition the electricity generated by a turbine it is distributed using high voltage wires to transformer station, the final stage is when the energy goes to hospital, schools, houses, industry all by subterranean cables.

    In conclusion this is the entire process necessary to generate electricity using water natural resource combined with human knowledge and technology, and how everything is distributed safely to all community by underground wires safely avoiding risk of electrocution.

  16. http://Sarker says

    Hi Liz,
    I feel so happy to connect with you………Here I write this task and waiting for your correction and valuable advice……….
    The diagram illustrates the process of producing electricity by water and then indicates where it is distributed. Overall. electricity is generated by water in turbine, passed through a number of phases before going to transformer station and allotting different places such as factories, households, hospitals, school etc.
    It is quite clear from the flowchart that evaporation is caused due to heat from sun on the sea water which leads to rain following the stage of cloud formation. As rain falls, it is stored in a reserviour with the help of a dam. After that , water of the reserviour is used to move to the turbine and a valve is connected near to the dam which controls the flow of water by opening and closing this. When turbine moves, electricity is produced and then transfer into transformer station by high voltage cables. At the same time, water from the turbine is recycled to the reserviour which is passing through the pump. Finally, electricity is distributed in different places by underground cables after reaching transformer station.

    • http://Liz says

      It’s good. You have the right information in the right place. However, make your paragraphs clearer. If paragraphs are not clear for the examiner, you will not get over band 5 for coherence and cohesion. Also check your vocabulary – a diagram is a diagram, it is not a flowchart. Don’t try to paraphrase – just be accurate. Also grammar – don’t use “etc”. There are clear examples in the diagram so use them only. Also linkers, don’t forget to use “and” when you write a list. You have potential to do well but work a bit on accuracy of language and paragraphing.

      • http://Sarker says

        Thanks a lot for your valuable comments. I try to correct according to your suggestions and again I post this for your comments and marks. Please have a look for your kind consideration.

        The diagram illustrates a number of phases involved in the process of electricity production and then indicates the location where it is distributed. Overall, electricity is generated in turbine by using reserve water which is recycled through pump for further production and then it is going to transformer station for use through high voltage cables.
        In the first stage of electricity generation, evaporation is caused due to heat from sun on the sea water which leads to cloud formation and then ultimately falls as rain following heavy from light clouds. After that, rain water is stored in a water reservoir which is controlled by a dam before going to turbine.
        In the next stage, reserve water being ready for producing electricity pass into a turbine and a valve is connected near the dam to control the flow of water by opening and closing of it. Electricity is produced when turbine is moved and at the same time water is recycled through pump for further electricity generation. Finally, produced electricity is distributed into factory, households, hospitals as well as schools via underground cables after reaching transformer station which is linked with turbine by high voltage cables.

        • http://Sarker says

          Dear Liz
          Please have a look on my writing and give score. It will give me more confidence and inspiration….waiting for your reply…………..

          • http://Liz says

            Sorry I don’t have time to assess writing for grading. You will need to find an IELTS teacher who will grade and mark your essay.
            All the best

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