IELTS Diagram: Model Answer Band Score 9

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.

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.

cement and concrete

  • Source: IELTS Cambridge English Test Book 8

Diagram Model Answer

The diagrams illustrate the way in which cement is made and how it is then used in the process of making concrete. Overall, limestone and clay pass through four stages before being bagged ready for use as cement which then accounts for 15% of the four materials used to produce concrete. While the process of making cement uses a number of tools, the production of concrete requires only a concrete mixer.

In the first stage of making cement, limestone and clay are crushed together to form a powder. 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.


IELTS Water Supply Diagram

The IELTS diagram below shows two diagrams in two different time periods. This diagram was not drawn by me but by an IELTS student called Shindhu who got this in the academic writing task 1 test.

Also see useful links for IELTS tips below.

IELTS Water Supply Diagram

IELTS Water Supply Diagram Present & Future 2015

Model Answer: Water Supply Diagram

The diagram illustrates the way the water supply system currently works in Australia and the plans for future changes. Overall, the main change in the future water supply system is based on recycling water for use in the city.

The current water supply system shows that pure 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 whereas waste water is sent to the 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, it can be seen that the storage of pure water in the dam and the uses of it in the city are the same as the previous system. 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 back for use in the city. It is planned that no water will be released into the river.

187 words

IELTS Rainwater Diagram

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IELTS Rainwater Diagram Reported 2018

This IELTS diagram appeared in 2015 and in 2018 (writing task 1 test academic). Below is a model answer. The IELTS rainwater diagram was reconstructed with the help of two IELTS candidates (Fay and Ahmad).  The model answer is estimated at band score 9.

IELTS Rainwater Diagram

Reported in 2015 and 2018 in the IELTS writing task 1 test.

IELTS Rainwater Diagram

IELTS Diagram Model Answer

The diagram illustrates how an Australian town collects rainwater to process in order to use as drinking water. Overall, rainwater collected from houses can be used for drinking after it has been processed by being filtered and then being treated with chemicals.

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

Diagram Model: Cement & Concrete

Line Graph Model: Consumption of Spreads

Table Model: Consumer Spending

All Writing Task 1 Lessons, Tips & Model Answers


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IELTS Writing Task 1: Life Cycle Diagram

Below is an IELTS writing task 1 life cycle diagram model answer and practice. 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

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 and black.

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.

  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

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.



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 if you are aiming for band score 6 and above. See below for an example of how to write the introduction and overview for the process shown in the picture.

The site uses images to explain objects.

Source: The diagram above was not designed by IELTS Liz.

Introduction and Overview

  • paraphrase the information given about the diagram for the introduction
  • choose the main stages for the overview ( eggs, water, tadpole, land, adult frogs)
Model Introduction and Overview
The diagram illustrates the different stages involved in the life of a frog. Overall, tadpoles, which emerge from eggs in the water, pass through a number of phases before going on to land and maturing into adult frogs.


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