Pie Chart

Band 7+: Energy sources in the USA in the 1980s and 1990s

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The image depicts two pie charts comparing main energy sources in the USA for the years 1980 and 1990. In 1980, oil comprised 42%, natural gas 26%, coal 22%, hydroelectric power 5%, and nuclear power 5%. By 1990, oil reduced to 33%, natural gas to 25%, coal increased to 27%, hydroelectric power remained at 5%, and nuclear power increased to 10%.

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

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The pie charts illustrate the comparison of proportions on five main sources of energy in the USA in 1980 and 1990.

Overall, oil was the most significant source of energy by far in both years. However, oil decreased its dominance in the market, whilst all other sources increased.

The three biggest sources of energy in 1980 were oil, natural gas, and coal, with 42%, 26%, and 22%, respectively. However, whilst oil decreased its share to a quarter, coal notably increased to 27% in 1990. Despite the minor decrease to 25%, natural gas remains fairly stable source of energy, however coal replaced its second-place position as the main source of energy in 1990.

The remaining two sources had around fifth of the total in 1980 each, whilst one power source remains constant. Of the two sources, nuclear power tell the most, increasing from 5% to 10%. Hydroelectric power remained stable with 5% share in both years.

Word Count: 155

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Overall Band Score

(+/- 0.5)

Vocabulary Complexity:
B1 - Intermediate
Using more sophisticated words could be beneficial.

Grammar Mistakes: N/A

Vocabulary Repetition:

sources: 5

energy: 5

source: 4

however: 3

whilst: 3

power: 3

Try using synonyms for the above words

Task Response

The report covers the main features of the pie charts and provides a reasonable overview of the changes between 1980 and 1990. However, there are some inaccuracies (e.g., oil decreasing to a quarter) and omissions (e.g., not explicitly stating the percentages for all categories in 1990). To improve, ensure greater accuracy in reporting the data and aim for a more comprehensive description by including all relevant figures.

Coherence & Cohesion

The report is generally well-organized with a clear overall structure, including an introduction, overview, and detailed paragraphs. However, there are some instances where the flow could be improved. For example, transitions between sentences and ideas could be smoother in the third and fourth paragraphs. Consider using cohesive devices more effectively to link ideas and improve the overall readability.

Lexical Resource

The report demonstrates a good range of vocabulary, appropriate for the task. Terms like 'dominance,' 'significant,' and 'notably' are used effectively. However, there's room to enhance the sophistication of the language. For instance, instead of 'oil decreased its dominance in the market,' you could use a more nuanced phrase like 'oil's market share diminished considerably.' Also, vary your vocabulary to avoid repetition (e.g., find alternatives for 'source of energy'). Boost vocabulary complexity to elevate the overall score.

Grammatical Range & Accuracy

The report demonstrates a good command of grammar, with a variety of sentence structures used. However, there are some grammatical errors and phrasing issues that need attention. For example, 'whilst oil decreased its share to a quarter' should be 'while oil's share decreased to a third'. Also, 'nuclear power tell the most' should be 'nuclear power increased the most'. Pay close attention to subject-verb agreement, correct use of prepositions, and accurate phrasing to enhance clarity and grammatical accuracy.

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