IELTS Diagram: Model Answer Band Score 9 with Tips

This IELTS diagram model answer is estimated at band score 9. It is possible to have a diagram in your IELTS writing task 1 academic paper. A diagram is also known as a process. The diagram shown below is from IELTS Cambridge Book 8, Test 3.

IELTS Diagrams

IELTS Diagrams come in two types:

Type 1: Diagram about a Cycle

This could be about a nature cycle or a life cycle.

Type 2: Diagram about a process

This could be a process of how to make something or how something works.

They both have the same techniques, the same layout, the same language, the same linking devices – everything is the same.

How to Tackle an IELTS Diagram

  1. Write an introduction from the description given. This is a short, factual introduction.
  2. The overview summarises the key stages of the diagram.
  3. The body paragraphs should be organised with stages in a logical order.
  4. Don’t miss any stages. You will be marked down for missing a stage.
  5. Paraphrase only when necessary and only when you know the word you plan to use is perfect. The biggest reason for vocabulary errors in IELTS writing is over-paraphrasing and poor paraphrasing. You don’t need to change all words.
  6. Using linking words to connect stages and to highlight the order that things happen.
  7. The instructions tell you to write over 150 words, but to get a high score, you should aim for about 170-190 words depending on the task given. If you write over 210 words you are likely to be marked down for getting lost in detail instead of focusing on key features.

IELTS Diagram Model Answer

The diagram below shows the stages and equipment used in the cement-making process, and how cement is used to produce concrete for building purposes.

IELTS Diagram Process

  • Source: IELTS Cambridge English Test Book

Diagram Model Answer

The diagrams illustrate the steps and equipment involved in the production of cement and the way in which cement is then used to make concrete.

Overall, limestone and clay pass through four stages before being bagged ready for use as cement. Cement is then combined with three other materials to create concrete. While the process of making cement uses a number of tools, the production of concrete is simpler and requires only a concrete mixer.

In the first stage of making cement, limestone and clay are crushed together to form a powder using a crusher. This powder is then combined in a mixer before passing into a rotating heater which has constant heat applied at one end of the tube. The resulting mixture is ground in order to produce cement. The final product is afterwards put into bags ready to be used.

Regarding the second diagram, concrete consists of mainly gravel, which is small stones, and this makes up 50% of the ingredients. The other materials used are sand (25%), cement (15%) and water (10%). These are all poured into a concrete mixer which continually rotates to combine the materials and ultimately produces concrete.

Comments: This diagram gives a concise introduction. The overview contains key features of both diagrams and also highlights the connection between them. The body paragraphs are organised well and linking devices are used flexibly and accurately. Each body paragraphs explained the steps of each process in a logical order. Complex sentences are accurate and there is also passive voice used. Collocations are well used.

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IELTS Diagram: Rainwater

This IELTS diagram appeared a number of time in Writing Task 1 (academic). It is typical of many diagrams that are used by IELTS. There is also a model diagram answer given below. The model answer is estimated at band score 9. Note that diagrams are also known as processes.

Note that as in all Writing Task 1 (academic paper), you must have an overview. Pay attention to the summary of key stages in the process in that statement.

IELTS Rainwater Diagram

Reported Diagram from IELTS candidates. This diagram has appeared over a number of years, most recently in 2024.

IELTS Rainwater Diagram

IELTS Diagram Model Answer

The diagram illustrates how an Australian town processes rainwater to use as drinking water.

Overall, rainwater is collected from houses and then passes through a filter into storage where it is then treated with chemicals to make it fit for human consumption.

Initially, the rain which falls on the rooftop is collected by the gutter and then runs down the pipe at the side of the house into the drain at the bottom. Each house collects rainwater in this way and the rainwater is then passed along underground drains to the water filter.

The rainwater passes through the water filter to remove any impurities. Once it has been filtered, it continues along the pipes to a storage tank. From this point, the water goes from storage to the water treatment. At this stage of the process, the water is treated with chemicals in order to make it fit for consumption. When the water is ready for drinking, it travels along pipes that lead back into the houses in the town where people can use the water for daily consumption.

179 words

Other IELTS Writing Task 1 Model Answers

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IELTS Water Supply Diagram Process

The IELTS diagram below shows two diagram processes in two different time periods – present and future. The diagram was reported in the test twice and will likely appear again as IELTS do recycle writing tasks. This is also known as an IELTS Process.

For diagrams, you must pay attention to key stages of the process. All IELTS writing task1 reports will have an overview and this includes diagrams. The overview is the key paragraph and must summarise the key stages but without writing a list. See the model answer below to learn about this.

IELTS Diagram Process: Water Supply Systems

Below you will find a band score 9 model answer for an IELTS Diagram/Process.

IELTS Diagram Process Water Supply Writing Task 1

IELTS Diagram Model Answer

Note: When you read the model answer below, pay attention to the different tenses used. See if you can spot the future passive voice.

The diagram illustrates the way the water supply system currently works in Australia and how the system will be changed in the future.

Overall, although both systems use the dam as a water supply, the present system returns both storm and waste water directly or indirectly to the river, whereas the future system plans to recycle both forms of water.

The current water supply system shows that water is stored in a dam before being transferred to a city to be used by households, shops and factories. From the city, storm water is directed straight into the river, by contrast waste water is sent to a water treatment plant to be processed. After the waste water is treated, it is safe to be released into the river.

Regarding the future water supply system, water will be brought from the dam for the same uses as in the present. However, both the storm water and waste water from the city are to be directed to the water treatment plant for processing after which they will both be recycled for use in the city. It is planned that no water will be released back into the river.

195 words

Three Key Points:

  1. The introduction provides a paraphrase of the rubric given. It is a short, functional paragraph.
  2. The overview summarises the diagram without getting lost in detail and without forming a list of stages. The overview is sufficiently developed for a high score.
  3. The body paragraphs are well organised with flexible linking which allows for accurate, complex sentence structures as well as a logical order of information. Tenses are used flexibly to show present and future information. As with most diagrams, the passive voice is used alongside the active voice. Vocabulary and collocations are used with accuracy and flexibility.

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IELTS Writing Task 1: Life Cycle Diagram

IELTS writing task 1 life cycle diagram model with two diagrams. This lesson focuses on the use of plural and singular nouns as well as using the correct verb form. You will also see how to write an introduction and overview for a diagram report.

IELTS Life Cycle Diagram with Two Diagrams

IELTS Lady Bird Diagram

Source: Each diagram above was sourced from google and compiled to create this diagram for IELTS practice.

IELTS Diagram Model Answer & Practice

This gap fill gives the first two paragraphs of the above IELTS practice diagram.

Use the words listed to fill in the gaps. You may need to alter the form of the word to ensure the sentence is grammatically correct, for example singular or plural nouns or verb form. Not all words are used.

wing     fix     spot    remain     hatch      end     behind      stage      emerge      eggs       lay         structure        elytra      finish     curl      over      

The first diagram illustrates the (1)……………. in the life of a lady bird, while the second diagram shows its body (2)……………………………

Overall, there are four stages in the life cycle of a lady bird from (3)………………….. to adult insect. The lady bird’s anatomy is characterised by colourful (4)………………. of red with black dots that cover its abdomen.

Initially, eggs are (5)…………………. on the underside of a leaf and (6) …………………. there for between two to five days. After this, larvae (7)……………… from the eggs and continue in that form for 21 days. At the end of the three weeks, the pupa stage begins where the larvae pupate by (8)……………… into a pupa on the backside of a leaf and this lasts for 7 days. At the (9)…………… of this stage, an adult lady bird emerges and the life cycle starts again.

The second diagram shows that the lady bird has bright red elytra with black (10)…………….. that cover both the wings and the abdomen. It also has six legs in total, three on each side. On its head, it has eyes and antennae, while just (11)……………. the head there is the pronotum.

ANSWERS

Answers
  1. stages
  2. structure
  3. egg
  4. elytra
  5. laid
  6. remain
  7. emerge
  8. curling
  9. end
  10. spots
  11. behind

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Practice Exercise for IELTS Diagrams Writing Grammar

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 (a / an / the / nothing) to match the noun given. These are the most common mistakes that students make with IELTS diagram descriptions. Articles are one of the main reasons people get a low score in Grammar.

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.

Grammar Exercise for IELTS Diagrams

Decide if the noun in brackets should have a, the or no article.

Example

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

Click for answers: Answers

  • Electricity (no article)
  • water (no article)
  • 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: Questions 1-10

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.

ANSWERS

Click below to reveal the answers:

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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IELTS Diagram: Introduction and Overview

For an IELTS diagram, you need an introduction and overall paragraph containing the main features of the diagram or process in your report. The overview is one of the most important parts of your report and a full overview is essential for a high band score.

The diagram below is of the life cycle of a frog. Life cycles and other cycles, such as the water cycle, are quite common diagrams to get in IELTS writing task 1. The other common type is a process which shows how something is made or how it works.

Introduction and Overview for IELTS Bar Chart

Introduction Paragraph

The introduction paragraph for most diagrams in IELTS is short. Don’t try to make it longer. All you need to do is paraphrase the description given above the diagram.

Overview Paragraph

This is the most important paragraph is all writing task 1 (academic). This means you should aim to have a full overview with stages well summarised. This isn’t just about the number of stages, but an overview of what the main stages are. And yes, you can use the words given in the diagram. The words are given for you to use.

Model Answer Click Below:

Model Introduction and Overview

Introduction Options

  • The diagram illustrates the stages in a frog’s life time.
  • The diagram illustrates the different stages in the life of a frog.
  • The diagram illustrates the phrases that a frog passes through during its life time.

Overview Paragraph

  • Overall, a frog passes through eight stages which start with adult frogs mating and eggs laid in the water from which tadpoles emerge. Tadpoles pass through a number of stages before becoming a froglet, a young frog and finally an adult frog, starting the life cycle again.

Note: this overview is complete. It gives a full summary of the key stages without going into detail. All the detail is then given in the body paragraphs.

Full Model Answer

The diagram illustrates the developmental phases that a frog passes through during its life time.

Overall, a frog passes through eight stages which start with adult frogs mating and eggs laid in the water from which tadpoles emerge. Tadpoles pass through three stages before becoming a froglet, a young frog and finally an adult frog, starting the life cycle again.

Initially, adult frogs mate and then the female frog lays eggs in the water, which are called frogspawn. Seven to ten days later, tadpoles emerge from the eggs which can swim and eat algae for food. Six weeks later, the tadpole grows and develop back legs. This development continues and nine weeks later it develops front legs. Its head and body also becomes more pronounced.

Twelve weeks after the tadpole stages, it becomes a froglet  which resembles a small frog. However, it still has a tail, although shorter than that of a tadpole. At this stage, it also develops pulmonary breathing which enables it to leave the water and breathe air on land. Over time, the froglet becomes a young frog and eventually, four years later, it is an adult frog ready to start the life cycle again.

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