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Reading: Diagram Labelling
You do not need to be an engineer or a scientist. Learn to decode the visual clues.
Mini-Masterclass: Decoding the Diagram
Many candidates panic when they see a complex scientific diagram. However, the diagram contains “anchors” (like numbers or pre-filled text) that tell you exactly where to scan in the passage.
The Scenario: The Dung Beetle Tunnels
Imagine a diagram showing three tunnels dug into the ground. The diagram has a Y-Axis on the left showing depth measurements: 0cm, 10cm, 20cm, and 30cm. You must label the 3 tunnels using a Word List of beetle nationalities (French, Spanish, South African).
“Some large species originating from France excavate tunnels to a depth of approximately 30 cm below the dung pat. South African beetles dig narrow tunnels of approximately 20 cm below the surface.”
How to Solve It:
Step 1: Find the Clue. Look at the diagram. The only difference between the tunnels is their depth on the scale (10cm, 20cm, 30cm). This is your scanning target!
Step 2: Scan for Numbers. Scan the text specifically for “20 cm” and “30 cm”.
Step 3: Read and Match. The text says tunnels “30 cm below” are from “France”. The Word List has the word “French”. Therefore, the deepest tunnel on the diagram is labeled “French”.
Step 2: Scan for Numbers. Scan the text specifically for “20 cm” and “30 cm”.
Step 3: Read and Match. The text says tunnels “30 cm below” are from “France”. The Word List has the word “French”. Therefore, the deepest tunnel on the diagram is labeled “French”.
The 5-Step Scanning Strategy
Do not try to understand the science. Treat the diagram as a visual map leading you to the vocabulary.
1
Check the Rules & Glossary
If you are choosing words from the text, note the limit (e.g., NO MORE THAN TWO WORDS). Also, look below the text immediately to see if there is a Glossary explaining highly technical words used in the diagram.
2
Analyze the Diagram’s Clues
Do not look at the text yet. Study the diagram. Look for numbers, temperatures, arrows showing a process, or any labels that are already completed. These are your Scanning Anchors.
3
Scan the Text for Anchors
Scan the passage to locate the paragraph that discusses the diagram. If the diagram has a label saying “Heated to 150°C”, scan the text exclusively for “150”. The answers will be clustered around that area.
4
Read the Section in Detail
Once you locate the correct paragraph, slow down and read it in deep detail. Expect heavy paraphrasing. If the diagram shows an arrow pointing down, the text might say “descends”, “drops”, or “sinks”.
5
Process of Elimination
If you are using a Word List, physically cross out words as you use them. If you cannot find one label, look at the remaining words in the list and use the process of elimination based on context.
10 Quick Strategy Challenges
Click to reveal how you should analyze these common Diagram Labelling scenarios.
1. The limit is “ONE WORD”. The text says “a protective outer casing”. What do you write?
Answer: casing. You must drop the adjectives “protective” and “outer” to fit the strict one-word limit.
2. True or False: You need to understand how the machine works to get the answers right.
False! This is a test of your reading and scanning skills, not your engineering knowledge. Rely on vocabulary and paraphrasing.
3. The diagram points to the top of a tree. The text says: “The highest branches are known as the canopy.” What is the label?
Answer: canopy. The phrase “highest branches” is a direct paraphrase for “the top of a tree”.
4. You see a word on the diagram that you don’t know (e.g., “mimetic”). What is your first step?
Check the bottom of the page for a glossary! If it’s not there, just use “mimetic” as a keyword to scan the text. The text will usually define it for you in the same sentence.
5. There is a Word List provided. The text says “South African beetles”. The Word List has two options: “South African” and “South African ball roller”.
You must read the paragraph in extreme detail to see what specific action the beetle is taking in the diagram, and match it to the specific beetle sub-type in the text. Do not just pick the first one you see!
6. The diagram shows arrows pointing in a circle. What kind of vocabulary should you scan for?
Scan for “Process” or “Lifecycle” vocabulary. Words like: then, next, subsequently, repeats, cycle, or returns to.
7. You cannot find the answer for Label 3. What is the best strategy?
Skip it and find Label 4! Diagrams often follow a chronological order in the text. Finding 2 and 4 will tell you exactly which sentence contains the answer for 3.
8. The limit is “NO MORE THAN TWO WORDS”. The text says “the mother-in-law”. Can you write this?
Yes! Hyphenated words (mother-in-law, state-of-the-art) count as ONE single word in the IELTS test.
9. The diagram has a label already filled in that says “15 degrees”. How does this help you?
It is an anchor! Scan the text rapidly for the number “15”. The paragraph containing “15” is exactly where you will find the answers for the missing labels.
10. You find the perfect word, but it’s spelled strangely in the text (e.g., ‘colour’ vs ‘color’). Which spelling should you use?
Copy the spelling EXACTLY as it appears in the reading passage. If you alter the spelling and make a mistake, you will lose the mark.
10 Full Diagram Practice Tests
Put your strategies to the ultimate test with these full IELTS Reading tasks.
