IELTS Computer Delivered Tests + Band Score

IELTS Diagram Task 1 Sample

This IELTS diagram task 1 sample is about how a structure is used to generate power from waves. 

An IELTS diagram is often much the same as an IELTS process. You should see a series of stages in the diagram and these should be explained in order, starting at the beginning.

In this example, the structures can be explained as well. You should make sure you mention everything. For example, the cliff and sea wall are also included in the response. 

IELTS Diagram Task 1 Sample

You should spend about 20 minutes on this task.

The diagrams below show a structure that is used to generate electricity from wave power. 

Summarise the information by selecting and reporting the main features and make comparisons where relevant.

Write at least 150 words.

Model Answer

The given illustrations present how electricity is generated using the power of the sea.

Overall, through a specially designed structure, a green source of electrical energy can be produced by the constant movement of the sea, which forces air through a chamber.

As seen in the first image, the man-made structure must be built next to a sea wall or cliff so that its foundation is strong enough to withstand the powerful waves. There is a specially constructed chamber, possibly built from a combination of metal and concrete, that allows seawater to flow in and out. The chamber leads into a column where a turbine is suspended. When a wave flows into the chamber, the water forcefully pushes the air out of the column. As the strong rush of air travels upwards, it pushes past the turbine, causing it to rotate quickly. It is this mechanical movement of the turbine that generates electricity.

As shown in the second picture, when the wave recedes, air refills the chamber, allowing the process to continue as the waves will keep entering and exiting the chamber, making the turbine spin continually. The result is a sustainable source of electrical energy.

(196 Words)


This is a good response as the IELTS diagram is introduced and an overview given of the main way the structure operates i.e. the movement of the sea and thus air creates the power.

Each of the diagrams is explained in a logical order so the process can be understood.

There is a good use of grammar and vocabulary

Join IELTS buddy for Free IELTS Tips!


Any comments or questions about this page or about IELTS? Post them here. Your email will not be published or shared.

Enjoy this page? Please pay it forward. Here's how...

Would you prefer to share this page with others by linking to it?

  1. Click on the HTML link code below.
  2. Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.

Band 7+ eBooks

"I think these eBooks are FANTASTIC!!! I know that's not academic language, but it's the truth!"

Linda, from Italy, Scored Band 7.5

ielts buddy ebooks