Coal is like a black rock that we can dig out of the ground.
Long, long ago, plants died and got buried deep in the earth.
Over a very, very long time, these plants turned into coal.
We can burn coal to make heat, like for warming our houses or making electricity.
So, it's a type of fuel that comes from old plants.
수준별 예문
We burn coal to make electricity for our homes.
Мы сжигаем уголь, чтобы производить электричество для наших домов.
Simple present tense, describing a general fact.
The train used a lot of coal to move fast.
Поезд использовал много угля, чтобы быстро двигаться.
Simple past tense, describing a past action.
Coal is a black rock that comes from under the ground.
Уголь — это черная порода, которая добывается из-под земли.
Simple present tense, describing a characteristic.
Long ago, people used coal to warm their houses.
Давным-давно люди использовали уголь для обогрева своих домов.
Simple past tense, describing a past habit or action.
My grandfather worked in a coal mine for many years.
Мой дедушка много лет работал на угольной шахте.
Simple past tense, describing a past activity.
Burning coal can make smoke and air pollution.
Сжигание угля может вызывать дым и загрязнение воздуха.
Present simple tense, describing a consequence.
They loaded the coal onto a big ship.
Они погрузили уголь на большой корабль.
Simple past tense, describing a completed action.
Some old factories still use coal for power.
Некоторые старые фабрики до сих пор используют уголь для получения энергии.
Simple present tense, describing a current situation.
자주 혼동되는 단어
Often contrasted with coal as another form of fossil fuel or energy source, but fundamentally different in state and extraction methods.
Another major fossil fuel, but liquid. Confusion arises from their shared classification as fossil fuels and energy sources.
Both are traditional solid fuels for burning, especially for heat. However, wood is plant matter, while coal is fossilized plant matter.
혼동하기 쉬운
Both 'coal' and 'charcoal' are black, burnable substances used for fuel. However, they have different origins and properties.
Coal is a naturally occurring fossil fuel, while charcoal is a man-made product made by heating wood in the absence of oxygen.
We used charcoal to grill the burgers, not coal.
Both are dark, solid fuels. 'Coke' is often mentioned in contexts related to industrial processes, similar to coal.
Coke is a fuel with few impurities and a high carbon content, made by heating coal or oil in the absence of air. It's a derivative of coal, not raw coal itself.
The blast furnace required a steady supply of coke to smelt the iron ore.
Coal is primarily composed of carbon, leading to confusion about whether the terms are interchangeable or represent the same thing.
Carbon is a chemical element, while coal is a complex mixture of carbon compounds and other elements. Coal is a *source* of carbon.
Diamonds are a pure form of carbon, unlike coal which is a carbon-rich rock.
Ash is the powdery residue left after burning coal, so they are often mentioned together in the context of combustion.
Coal is the fuel itself, while ash is the non-combustible residue that remains after coal has been burned.
After the fire died down, only a pile of white ash remained from the burned coal.
Both 'coal' and 'ore' are terms for materials extracted from the earth through mining.
Coal is a combustible sedimentary rock used as fuel. Ore is a naturally occurring solid material from which a metal or valuable mineral can be profitably extracted.
The miners extracted iron ore from the mountain, but they also found seams of coal.
셀프 테스트 12 질문
This sentence describes a common use for coal.
This sentence describes the color and type of coal.
This sentence explains where coal comes from.
Imagine you are an energy policy advisor. Write a short paragraph discussing the future of coal as an energy source, considering both its historical importance and the current global shift towards renewable energy.
Well written! Good try! Check the sample answer below.
Sample answer
Historically, coal has been a cornerstone of global energy production, fueling industrial growth and electricity generation for centuries. However, its future as an energy source is increasingly challenged by environmental concerns, particularly regarding carbon emissions. As nations strive to meet climate targets, the transition towards renewable energy sources like solar and wind power is accelerating, leading to a decline in new coal-fired power plants. While some regions may continue to rely on coal for the foreseeable future, its long-term viability will likely diminish, necessitating significant investment in cleaner alternatives and carbon capture technologies.
Describe the process of how coal is formed and its primary uses throughout history.
Well written! Good try! Check the sample answer below.
Sample answer
Coal is formed over millions of years from the fossilized remains of ancient plants that accumulated in swampy environments. As layers of sediment built up, intense pressure and heat transformed the organic plant matter into coal. Throughout history, coal has been a vital energy source. It was instrumental in the Industrial Revolution, powering steam engines and factories. Later, it became a primary fuel for generating electricity and heating buildings, profoundly impacting human civilization and technological advancement.
Write a short report (2-3 sentences) on the environmental impact of burning coal and potential alternatives.
Well written! Good try! Check the sample answer below.
Sample answer
Burning coal releases significant amounts of greenhouse gases and pollutants into the atmosphere, contributing to air pollution and exacerbating climate change. This environmental impact necessitates a global shift towards cleaner energy sources. Renewable alternatives such as solar, wind, and hydropower offer sustainable solutions that can mitigate these harmful effects and provide a more environmentally friendly energy future.
What is the main reason for the decline of the coal mining industry in Blackwood?
Read this passage:
The town of Blackwood was once a thriving community, built entirely around the prosperous coal mining industry. Generations of families worked in the mines, and the black dust that settled on every surface was a testament to their livelihoods. However, as demand for coal diminished and environmental regulations tightened, the mines began to close, leaving many unemployed and forcing the town to seek new avenues for economic survival.
What is the main reason for the decline of the coal mining industry in Blackwood?
The passage explicitly states that 'as demand for coal diminished and environmental regulations tightened, the mines began to close,' indicating these as the primary reasons for the industry's decline.
The passage explicitly states that 'as demand for coal diminished and environmental regulations tightened, the mines began to close,' indicating these as the primary reasons for the industry's decline.
What is the primary reason for countries phasing out coal-fired power plants?
Read this passage:
While coal has been a primary energy source for centuries, its role is rapidly changing. Many countries are now investing heavily in renewable energy technologies, aiming to phase out coal-fired power plants due to their significant contribution to greenhouse gas emissions. This global energy transition presents both challenges and opportunities for economies historically reliant on coal production.
What is the primary reason for countries phasing out coal-fired power plants?
The passage clearly states that countries are 'aiming to phase out coal-fired power plants due to their significant contribution to greenhouse gas emissions.'
The passage clearly states that countries are 'aiming to phase out coal-fired power plants due to their significant contribution to greenhouse gas emissions.'
Which component is the primary constituent of coal?
Read this passage:
Coal, a fossil fuel, is primarily composed of carbon, along with varying amounts of hydrogen, sulfur, oxygen, and nitrogen. Its energy content is derived from the chemical bonds formed during the transformation of ancient plant matter. Different types of coal, such as anthracite, bituminous, and lignite, are classified based on their carbon content and energy density, with anthracite being the highest quality.
Which component is the primary constituent of coal?
The passage states, 'Coal, a fossil fuel, is primarily composed of carbon.'
The passage states, 'Coal, a fossil fuel, is primarily composed of carbon.'
/ 12 correct
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