Academic Writing Task 1 · process diagram

The process of recycling and manufacturing glass bottles

The diagram shows how glass bottles are recycled.

Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.

Glass bottle recycling process
  1. 1.Collection of used bottles from customers
  2. 2.Transportation to collection point
  3. 3.Stage 2: Cleaning plant using high pressurised water
  4. 4.Glass factory processing green, brown, and clear glass
  5. 5.Melting glass pieces in a furnace
  6. 6.Moulding new liquid glass
  7. 7.Stage 3: Filling and packing
  8. 8.Distribution to supermarkets and customers

Chart redrawn by BandLadder from the data in the original IELTS practice task. Many IELTS practice tasks come from the Cambridge IELTS series (Cambridge University Press & Assessment); all rights in the original tasks remain with their owners.

Band 8 sample answer

The provided diagram illustrates the cyclical process of recycling glass bottles, which involves three distinct stages of collection, cleaning or manufacturing, and distribution.

Overall, the process is a closed-loop system that begins with consumers and ends with the return of new products to supermarkets. The cycle can follow two paths: one where bottles are cleaned and reused, and another where glass is melted down to create new containers.

In the first stage, customers return used bottles to a collection point, from where they are transported to a cleaning plant. At this facility, the bottles are washed using high-pressurised water. Alternatively, glass can be sent to a factory, where green, brown, and clear glass are broken into pieces. These pieces are then heated in a furnace to create liquid glass, which is subsequently poured into moulds to form new bottles.

Finally, in stage three, the processed or newly manufactured bottles are filled and packed before being distributed to supermarkets. From there, the bottles are purchased by customers, completing the cycle as they are eventually returned for recycling once again.

178 words. Every figure in the answer comes from the chart above.

How to write about process diagrams

cyclical
occurring in a repeating series of events
closed-loop
a system where materials are continuously reused
subsequently
happening after something else in a sequence
alternatively
offering a different possibility or second option
illustrates
shows or explains something using a picture
distinct
clearly different or separate from each other

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Frequently asked questions

What should the overview say?

The recycling process is a cyclical system that involves collecting used bottles, cleaning or melting them down, and redistributing new products to consumers.

How long should an IELTS Task 1 answer be?

At least 150 words; 170 to 200 is the safe range. Spend about 20 minutes on it and leave 40 for Task 2, which carries twice the marks.

How do I describe process diagrams?

Say how many stages there are and where the process starts and ends. Use the passive and sequencers: first, after this, once, finally. Keep every stage; a missing step costs task achievement.

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