You should spend about 20 minutes on this task.
The diagram below shows how a biofuel called ethanol is produced.
Summarize the information by selecting and reporting the main features, and make comparisons where relevant.
Write at least 150 words.
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Model Answer 1
The diagram illustrates how a biofuel called ethanol is produced. It outlines a cyclical process involving natural and industrial steps, showing the transformation from plant-based materials to ethanol and highlighting how the carbon dioxide emitted by transport completes the cycle.
From a broad perspective, the production process begins with the harvesting of plants and trees, which absorb energy from sunlight and carbon dioxide. This leads to a sequence of chemical and biological steps that convert plant materials into ethanol. The final product is distributed for transportation purposes, where the combustion of ethanol generates carbon dioxide, continuing the circular nature of the system.
Initially, plants and trees are harvested after absorbing sunlight and carbon dioxide, with machines playing a role in the collection process. The gathered material undergoes pre-processing to break it down into cellulose, which serves as a key component for ethanol production. This cellulose then proceeds to chemical processing, where sugars are extracted.
In the subsequent stages, microbes are added to the sugars, initiating fermentation to produce ethanol. Once ethanol is ready, it is used in various transport modes, such as cars, trucks, and airplanes. These vehicles release carbon dioxide into the atmosphere, which re-enters the cycle by feeding the plants used in future ethanol production, thus sustaining the process.
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Model Answer 2
The diagram illustrates how a biofuel called ethanol is produced, showing the complete cyclical process from plant growth to ethanol use in transportation. The process involves several stages, starting with the collection and processing of plant-based materials and ending with carbon dioxide emissions, which play a role in sustaining future ethanol production.
In a broad view, the process begins with plants and trees absorbing sunlight and carbon dioxide, which provides the energy required for their growth. These plants are harvested and undergo pre-processing to extract cellulose. The cellulose is then broken down into sugars, which, through fermentation with the help of microbes, are converted into ethanol. The ethanol is subsequently used as fuel in various vehicles, including cars, trucks, and airplanes, with the carbon dioxide emissions completing the cycle by feeding future plant growth.
In more detail, after plants are harvested using machines, they are pre-processed to separate cellulose, an essential component for ethanol production. This cellulose enters a chemical processing stage, where it is further converted into sugars. Once the sugars are obtained, microbes are introduced, initiating fermentation that results in the production of ethanol.
The final ethanol product is used as fuel in several transportation modes, including automobiles, trucks, and aircraft. As these vehicles burn ethanol, carbon dioxide is released into the environment. This carbon dioxide re-enters the system by contributing to the growth of new plants and trees, maintaining the circular flow in the process of how a biofuel called ethanol is produced.
Model Answer 3
The diagram demonstrates how a biofuel called ethanol is produced, depicting a continuous cycle that transforms plant materials into ethanol and highlights the role of carbon dioxide throughout the process. The illustration outlines both natural and industrial phases, where plant growth, processing, and ethanol usage in transportation are interconnected through a carbon cycle.
At a glance, the production process starts with plants and trees absorbing energy from sunlight and carbon dioxide to grow. After being harvested, these organic materials are processed in multiple stages to produce ethanol, which is then used as fuel in different vehicles. The carbon dioxide emitted during ethanol combustion is reabsorbed by new plant growth, ensuring the sustainability of this cyclical system.
In more detail, plants and trees are initially collected through mechanical harvesting. These raw materials are then subjected to pre-processing, where cellulose—a key component for biofuel production—is extracted. The cellulose undergoes further chemical processing to yield sugars, setting the stage for the next transformation.
The sugars obtained are fermented with the help of microbes to produce ethanol. This biofuel is then used to power vehicles, including cars, trucks, and airplanes. As these transport modes burn ethanol, carbon dioxide is released into the atmosphere. This released carbon dioxide is absorbed by growing plants, ensuring the continuity of the system in how a biofuel called ethanol is produced.
Model Answer 4
The diagram illustrates how a biofuel called ethanol is produced, presenting a closed-loop process that integrates plant-based resources with industrial procedures to create ethanol, while also showing the role of carbon dioxide throughout the cycle. The process connects biological growth with fuel production, ensuring sustainability through the absorption and release of carbon dioxide.
Looking at the bigger picture, the process begins with the natural growth of plants and trees that capture sunlight and carbon dioxide. These plants are harvested and processed through several stages to extract ethanol, which is later used as fuel. The carbon dioxide emitted from vehicles running on ethanol feeds back into the system, supporting future plant growth and maintaining the cycle’s continuity.
In more detail, plants are harvested using machines, and the collected biomass undergoes pre-processing, where cellulose, the core raw material for ethanol production, is separated. The cellulose is then converted into sugars through chemical processing, preparing it for the fermentation stage.
During fermentation, microbes are introduced to transform the sugars into ethanol. Once the ethanol is produced, it becomes a fuel source for cars, trucks, and airplanes. The combustion of ethanol releases carbon dioxide into the atmosphere, which is absorbed by new plant growth, completing the cycle in how a biofuel called ethanol is produced.
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