TOEFL TPO -1 Speaking Task 4 Sample: Using points and examples from the lecture, describe two contributing factors to urban heat island effect.

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Using points and examples from the lecture, describe two contributing factors to urban heat island effect.

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Sub Scores Delivery: 3 Language Use: 3 Topic Development: 3
Estimated Scores

23. 3. Delivery

The speaker's delivery is generally clear and fluid, with a consistent pace and only occasional pauses. However, there are some areas where the speech could be improved. For instance, the speaker could work on enunciating words more clearly and avoiding repetition of words like "contribute" and "heat." Additionally, the speaker should focus on using more natural transitions between ideas to improve the overall flow of the response.

Topic Development The speaker provides a coherent and well-organized response, with clear connections between ideas and sufficient support or examples from the lecture. However, there is room for improvement in topic development. The speaker could work on providing more specific details from the lecture to support their points, such as mentioning the role of dark-colored construction materials in absorbing sunlight or the impact of vehicle emissions on greenhouse gas effect. Furthermore, it would be helpful to use more varied language when discussing these factors to avoid repetition and enhance clarity.

6. Language Use

Original: According to the listening, the lecturer explains two contributing factors to urban heat island effect. The first rule is, construction uses in houses, roads, and something like that contribute to get higher heat in the cities. And also, using darker substances instead of light contribute to getting hotter city area. And in the night, the road store the heat from the sun and release it into the air at night. The second category is that emission by machines and HVAC systems. So, not only the vehicles release heat, but also they emit greenhouse gas effect. So, these gases trap the heat in the area.

Corrected: According to the listening, the lecturer explains two contributing factors to ~~urban heat island effect~~ the urban heat island effect. The first ~~rule~~ factor ("rule" is not appropriate here; "factor" is more accurate) is that construction materials used in houses, roads, and ~~something like that~~ similar structures ("something like that" is too informal; "similar structures" is clearer) contribute to ~~get higher heat~~ increased temperatures in cities. Additionally, using darker materials instead of lighter ones contributes to a hotter urban environment. At night, roads store heat from the sun and release it into the air. The second factor involves emissions from machines and HVAC systems. Vehicles not only release heat but also emit greenhouse gases, which trap heat in the area.

Revised (140 words): According to the listening, the lecturer explains two contributing factors to the urban heat island effect. The first factor is that construction materials used in houses, roads, and similar structures contribute to increased temperatures in cities. This is due to darker materials absorbing more sunlight than lighter ones, leading to a hotter urban environment. At night, roads store heat from the sun and release it into the air, further exacerbating the temperature difference between urban and rural areas. The second factor involves emissions from machines and HVAC systems, particularly vehicles. Vehicles not only release heat as a byproduct of engine combustion but also emit greenhouse gases that contribute to the greenhouse gas effect. These gases trap heat in the area, intensifying the urban heat island effect and making cities significantly warmer than their surrounding rural areas.

Mind Map

Urban Heat Island Effect
|
|-- Contributing Factors
|   |
|   |-- Construction Materials
|   |   |
|   |   |-- Darker Materials
|   |   |-- Increased Temperatures
|   |   |-- Heat Storage and Release at Night
|   |
|   |-- Emissions from Machines and HVAC Systems
|       |
|       |-- Vehicles
|       |   |
|       |   |-- Heat Release from Engine Combustion
|       |   |-- Greenhouse Gas Emissions
|
|-- Temperature Difference between Urban and Rural Areas

Key Words

Words	Phonetic Symbols	Parts of Speech	English Definitions	Sample Sentences
Urban Heat Island	ˈɜr·bən hit ˈaɪ·lənd	Noun	A metropolitan area that is significantly warmer than its surrounding rural areas due to human activities.	The urban heat island effect is a major concern for city dwellers, as it can lead to increased energy consumption and reduced air quality.
Emissions	ɪˈmɪʃ·ənz	Noun	The production and discharge of gases or other substances into the air.	Reducing vehicle emissions is essential for mitigating the urban heat island effect and improving air quality in cities.
Construction Materials	kənˈstrʌk·ʃən məˈtɪr·i·əlz	Noun	The substances used in the building of houses, roads, and other structures.	The choice of construction materials can significantly impact the urban heat island effect, as darker materials absorb more sunlight and contribute to higher temperatures.
Greenhouse Gas Effect	ˈgriːnhaʊs gæs ɪˈfekt	Noun	The warming of the Earth's surface due to the trapping of heat by greenhouse gases in the atmosphere.	The greenhouse gas effect is a major contributor to global warming, and reducing emissions from vehicles and factories can help mitigate its impact on the urban heat island effect.
Combustion	kəmˈbʌs·ʃən	Noun	The process of burning something, typically in an engine or other machinery, producing heat as a byproduct.	Engine combustion in vehicles not only releases heat but also emits greenhouse gases, which contribute to the urban heat island effect and exacerbate temperature differences between urban and rural areas.