Process Diagram

Band 8+: The diagram below shows the process of desalination, in which seawater is converted into drinking water. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.

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Image for topic: The diagram below shows the process of desalination, in which seawater is converted into drinking water. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.

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The image illustrates the Water Desalination Process through 7 steps. Step 1: Seawater intake. Step 2: Intake screening. Step 3: Pretreatment filters. Step 4: Reverse osmosis membrane unit removes salt and other impurities from the water. Step 5: Post treatment to drinking water standard. Step 6: Drinking water supply tank. Step 7: Seawater concentrate is safely returned to the ocean through the outlet via an outlet tunnel.

Given the complexity of the image, the above description may not be entirely accurate.

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The diagram illustrates how seawater is treated to become drinkable water through a process known as desalination.

Overall, there are 7 steps in the procedure, in which it relies on reverse osmosis and a membrane unit, along with pretreatment and post-treatment steps to make seawater drinkable.

The initial step is to collect seawater through several pipes. Then, it is screened for large impurities and foreign objects. Next, the water is moved to filters that pretreat the water, ready for the main treatment.

The next stage would involve techniques such as reverse osmosis and using a unit made out of membrane to take out salt and other impurities from the water. After this stage, the treated water is then processed one more time so that it meets the standard of drinking water, then the final product, which is clean water, is stored in a supply tank. Finally, outlet tunnels are utilized to move the concentrated seawater safely back to the ocean.

Word Count: 160

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Overall Band Score

8.5

(+/- 0.5)

Vocabulary Complexity:
B2 - Upper Intermediate
Opt for even more advanced words when appropriate.

Grammar Mistakes: N/A

Vocabulary Repetition:

water: 7

seawater: 4

Try using synonyms for the above words

Task Response

The report effectively summarizes the desalination process, covering all the key stages from seawater intake to the return of concentrate to the ocean. The description is clear and easy to follow. To further enhance the response, consider adding more specific details about the purpose of each step or the types of impurities removed during pretreatment and reverse osmosis. Also, ensure a variety of vocabulary is used to describe the process.

Coherence & Cohesion

The report is well-organized and easy to follow. The progression through the desalination process is logical and clear. Transitions between steps are generally smooth, contributing to a coherent overview. To further enhance coherence, consider using more varied cohesive devices to link ideas within and between paragraphs. For example, you could use synonyms or paraphrasing to refer back to previously mentioned elements, or add conjunctions to clarify the relationships between steps in the process.

Lexical Resource

The report demonstrates a good range of vocabulary related to the desalination process. Terms like 'reverse osmosis,' 'membrane unit,' 'pretreatment,' and 'post-treatment' are used appropriately. To further enhance the lexical resource, consider incorporating more specific or technical vocabulary related to water treatment processes. For example, instead of 'large impurities,' you could use more precise terms like 'particulate matter' or 'suspended solids.' Also, explore using synonyms to add variety and sophistication to your language.

Grammatical Range & Accuracy

The report demonstrates excellent grammatical control. A variety of sentence structures are used accurately and appropriately throughout the description of the desalination process. There are virtually no grammatical errors or phrasing issues, indicating a strong command of English grammar. The punctuation is also accurate and contributes to the clarity of the report.

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Band 8+: The diagram below shows the process of desalination, in which seawater is converted into drinking water. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.

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