IELTS Academic Task 1: Process Diagrams

The Process Diagram is the “recipe” of the IELTS Academic Writing test. Instead of analyzing data or maps, you are given a visual guide showing how something is made (Manufacturing) or how a living thing grows (Life Cycle).

Your mission is to describe the stages of the process in logical order. You have 20 minutes to write a report of at least 150 words.

The Two Types of Processes

First, identify what you are looking at. This determines your vocabulary.

Type A: Man-Made Process (Linear)

What it is: A manufacturing line (e.g., Making concrete, Brick production, Water recycling).
Key Feature: It has a clear Start and End.
Grammar: Heavily relies on Passive Voice (because we don’t care who is making the bricks, only that they are made).

Type B: Natural Cycle (Cyclical)

What it is: A biological life cycle (e.g., The life cycle of a frog, How rain is formed).
Key Feature: It is a Circle (Loop). The end connects back to the start.
Grammar: Often uses Active Voice (because the frog jumps, the rain falls).

The Perfect 4-Paragraph Structure

Do not try to be creative. Follow this formula to ensure you cover every step.

Paragraph 1: The Introduction

Paraphrase the question statement.

Question: “The diagram illustrates the process of making cement.”
Your Intro: “The diagram demonstrates the various stages involved in the production of cement for the building industry.”

Paragraph 2: The Overview (The “Bird’s Eye View”)

Summarize the process.

Count the Steps: “Overall, there are five main stages in this process…”
Mention Start/End: “…beginning with the extraction of raw materials and culminating in the packaging of the final product.”
For Cycles: “…beginning with the egg stage and ending with the development of a mature adult.”

Paragraph 3: Body Paragraph A (First Half)

Describe the first few steps in detail.

Sequencing: “First of all,” “Subsequently,” “Following this.”

Paragraph 4: Body Paragraph B (Second Half)

Describe the remaining steps until the end.

Sequencing: “Once this is complete,” “Finally.”

The Grammar Secret: Passive Voice

If you write a manufacturing process in the active voice (“People dry the bricks”), you will likely get a Band 5.0 or 6.0. To score Band 7.0+, you must use the Passive Voice.

The Formula:

Object + is/are + Past Participle (Verb 3)

Active (Bad): “The machine crushes the stones.”
Passive (Good): “The stones are crushed by a machine.”
Active (Bad): “They heat the mixture.”
Passive (Good): “The mixture is heated to a high temperature.”

Essential Vocabulary: The “Sequencers”

You cannot just write simple sentences. You must connect the steps using “Sequencers” (Time Connectors).

Beginning	Middle Steps	Ending
First of all,	Subsequently,	Finally,
To begin with,	Following this,	The process concludes when…
The process commences with…	Then / Next / After that
	Once (e.g., “Once the clay is dried…“)

Verbs of Transformation

You need specific verbs to describe what is happening to the materials.

For Manufacturing (Man-Made)

Prepare: Collected, Harvested, Extracted.
Change: Crushed, Ground, Mixed, Heated, Melted.
Shape: Molded, Shaped, Cut, Dried, Cooled.
Finish: Packaged, Delivered, Distributed, Transported.

For Life Cycles (Natural)

Born: Laid (eggs), Hatched.
Grow: Develop, Grow, Expand, Mature.
Move: Emerge, Molt, Fly, Migrate.

Top 3 Mistakes to Avoid

Missing a Step: You are graded on “Task Achievement.” If you skip the “cooling” stage, you lose marks. Follow the arrows carefully!
Using “I” or “We”: Never use personal pronouns. Do not say “We see that the bricks are dried.” Just say “The bricks are dried.”
Confusing Active/Passive:
- Correct: “The sun shines.” (Natural/Active)
- Correct: “The water is purified.” (Man-made/Passive)