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Band 7+: The two graphs show the main sources of energy in the USA in the 1980s and the 1990s. Write a report for a university lecturer describing the changes which occured

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The image contains two pie charts comparing energy sources in the USA for 1980 and 1990. In 1980: Oil 42%, Natural Gas 26%, Coal 22%, Hydroelectric Power 5%, Nuclear Power 5%. In 1990: Oil 33%, Natural Gas 25%, Coal 27%, Hydroelectric Power 5%, Nuclear Power 10%.

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In 1980, oil contributed to 42% of the total energy, while natural gas, the second biggest contributor, was at 26%. Over the 10 years, oil has significantly dropped to 33%. On the other hand, natural gas has shown a small decline from 26% to 25%.

Coal has shown an increase in the amount of energy, while hydroelectric power remained the same, and Nuclear power has doubled from 1980 to 1990. Coal was at 22% in 1980 and has grown to 27%. Hydroelectric power remains at 5% in both graphs, and the amount of Nuclear power has doubled from 5% in 1980 to 10% by 1990.

Word Count: 141

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Overall Band Score

(+/- 0.5)

Vocabulary Complexity:
A2 - Upper Beginner
Consider using more varied and advanced words.

Grammar Mistakes: N/A

Vocabulary Repetition:

power: 4

graphs: 3

energy: 3

natural: 3

Try using synonyms for the above words

Task Response

The report effectively addresses the task by describing the main changes in energy sources between 1980 and 1990. It provides a clear overview and accurately presents the key data, including the significant drop in oil, the slight decline in natural gas, the increase in coal, the stability of hydroelectric power, and the doubling of nuclear power. The structure is logical, with a clear introduction, overview, and detailed paragraphs. Minor improvements could include more precise language (e.g., 'contributed to' could be 'accounted for') and ensuring consistent tense usage. Overall, the response is well-organized and sufficiently covers the requirements. The report falls short of the required 150 words.

Coherence & Cohesion

The report is logically organized with a clear overview and a body that groups related data. However, the flow could be improved by using more cohesive devices to link ideas and avoid abrupt transitions. For example, the second paragraph could be better connected to the third, and the final sentence could be integrated more smoothly. Consider using phrases like 'In contrast' or 'Meanwhile' to enhance the logical progression.

Lexical Resource

The vocabulary used is appropriate and generally accurate, with some good attempts at paraphrasing (e.g., 'contributed to', 'shown a small decline'). However, there is room for more variety and sophistication. For instance, instead of repeating 'has shown' and 'has grown', you could use synonyms like 'experienced', 'witnessed', or 'rose'. Additionally, the phrase 'the amount of Nuclear power' could be more precise, such as 'the share of nuclear power'. Boost vocabulary complexity to elevate the overall score.

Grammatical Range & Accuracy

The report demonstrates a reasonable range of grammatical structures, but there are some errors and awkward phrasings that affect clarity. For example, 'oil has significantly dropped' should be 'oil dropped significantly' or 'oil experienced a significant drop'. Also, 'the amount of Nuclear power has doubled' could be improved to 'the share of nuclear power doubled'. The use of present perfect ('has dropped', 'has shown') is inconsistent with the past time frame (1980 and 1990); using past simple would be more appropriate. Punctuation and sentence structure are generally correct, but these issues slightly detract from the overall accuracy.

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