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Process Diagram

Band 5+: The diagram below shows how geothermal energy is used to produce electricity. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

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Image for topic: The diagram below shows how geothermal energy is used to produce electricity. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

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The image shows a labeled diagram of a geothermal power plant, with annotations indicating the flow of cold water down 4.5 km into the injection well, through the geothermal zone containing hot rocks, and up the production well as hot water, which powers a turbine connected to a generator that produces electricity, and then passes through a condenser to be pumped back down, completing the cycle.

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

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The diagram illustrates the process of electricity generation using geothermal energy in the geothermal power plant.

At the first stage of electricity generation, cold water is pumped down into the injection well, the depth of the well is 4.5km. Next, the cold water enters to the geothermal area consisted with hot rocks in order to heat the cold water into hot water. The hot water is then pumped up from the production well which is wider than the injection well and is the same length as it into the condenser.

When hot water is pumped up into the condenser, it will be condensed in order to convert it into steam and then the steam is sent to the turbine. The turbine can be powered by the steam to make it spin to trigger the generator. Finally, the generator is powered by the turbine and generate amounts of electricity.

We can see that it will need 6 steps to transform cold water into electric power and the generator is powered by water indirectly.

Word Count: 172

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Overall Band Score

5.5

(+/- 0.5)

Vocabulary Complexity:
C1 - Intricate
Strive to incorporate even richer and more precise language.

Grammar Mistakes: N/A

Vocabulary Repetition:

water: 8

geothermal: 3

pumped: 3

steam: 3

turbine: 3

powered: 3

generator: 3

Try using synonyms for the above words

Task Response

The response adequately summarizes the main features of the process of electricity generation using geothermal energy. However, there are some inaccuracies and omissions in the report, such as not mentioning the condenser pumping the water back down to complete the cycle and not making relevant comparisons as instructed by the task.

Coherence & Cohesion

The report is generally coherent and cohesive, but there are some issues with paragraphing and some lapses in coherence and cohesion due to the lack of clear progression of ideas and some repetition.

Lexical Resource

There is a range of vocabulary used, but it lacks precision and accuracy in some instances. The report would benefit from more varied and sophisticated vocabulary related to the process of geothermal energy generation.

Grammatical Range & Accuracy

While there is an attempt to use a variety of sentence structures, there are noticeable grammatical errors and inaccuracies throughout the report, particularly in the use of verb tenses and prepositions.

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Band 5+: The diagram below shows how geothermal energy is used to produce electricity. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

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Overall Band Score

Task Response

Coherence & Cohesion

Lexical Resource

Grammatical Range & Accuracy

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The diagram below shows how geothermal energy is used to produce electricity. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram below shows how geothermal energy is used to produce electricity. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram below shows how geothermal energy is used to produce electricity. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

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