Choose the most appropriate option to fill in the blanks in the given passage. The Earth's temperature is rising (1)______ .Scientists say that the rise in the average temperature ranges from 1.8°C to 4°C. This (2) ______ in temperature is called global warming or climate change. Although it is a natural phenomenon, human action is the (3) ______ cause of global warming. The burning of fossil fuels such as petroleum and coal (4) ______ a lot of greenhouse gases into the Earth's atmosphere. Carbon dioxide, methane and nitrous oxide are the main greenhouse gases (5)________ for global warming. Besides greenhouse gases, deforestation is (6) ______ major cause of this problem. Global warming has led to changes in temperature and rainfall patterns which have severely (7) ______ agriculture. No one can (8) ______ that this is the most serious environmental challenge that mankind is facing today. While it is not possible to reverse the process, the rate of global warming can be checked if all the countries (9) ______ some measures. (10) ______ of the measures is recycling and reusing articles like paper, glass, aluminium and plastic.
Select the most appropriate option to fill blank no 4.
releases
Understanding How Fossil Fuels Cause Global Warming
The passage discusses global warming and its causes, focusing on the role of human activities. The specific sentence for blank 4 is: "The burning of fossil fuels such as petroleum and coal (4) ______ a lot of greenhouse gases into the Earth's atmosphere." We need to choose the word that best describes what burning fossil fuels does to greenhouse gases.
Analyzing the Options for Blank 4
Let's look at the options provided:
- realizes
- releases
- revives
- leads
Consider the meaning of each word in the context of burning fossil fuels and gases:
- Realizes: This word means to become aware of something or to achieve something. Burning fossil fuels does not "realize" gases. This option does not fit the meaning of the sentence.
- Releases: This word means to allow something to move, act, or flow freely. When substances are burned, they often release gases as a byproduct of the chemical reaction. Burning fossil fuels like petroleum and coal causes chemical reactions that produce and release gases, including greenhouse gases like carbon dioxide. This option fits the meaning perfectly.
- Revives: This word means to restore something to life or consciousness, or to bring back into existence or use. Burning fossil fuels does not "revive" gases. This option is completely unrelated to the process described.
- Leads: This word means to cause something to happen or to result in something. While burning fossil fuels does *lead* to greenhouse gases being in the atmosphere, the sentence structure requires a verb that describes the action of putting the gases *into* the atmosphere. "Releases" is a more direct and accurate verb for this action. For example, you could say "Burning fossil fuels leads to global warming," or "Burning fossil fuels leads to an increase in greenhouse gases," but in the sentence "Burning fossil fuels... a lot of greenhouse gases into the Earth's atmosphere," "releases" is the most appropriate word.
Based on this analysis, the word that accurately describes the action of burning fossil fuels putting greenhouse gases into the atmosphere is "releases".
Why 'Releases' is the Correct Choice
The process of combustion (burning) of fossil fuels involves chemical reactions that produce various substances, including gases. These gases are then emitted or "released" into the surrounding environment, which in this case is the Earth's atmosphere. Greenhouse gases like carbon dioxide and methane are direct products released during the incomplete or complete combustion of fossil fuels such as coal, oil, and natural gas.
Summary of the Sentence with the Correct Word
Filling in the blank with "releases", the sentence reads: "The burning of fossil fuels such as petroleum and coal releases a lot of greenhouse gases into the Earth's atmosphere." This sentence is scientifically accurate and grammatically correct in the context of the passage about global warming.
Revision Table: Understanding Key Terms
| Term | Definition in Context | Relevance to Global Warming |
|---|---|---|
| Fossil Fuels | Carbon-based energy sources formed from ancient organic matter (e.g., coal, petroleum, natural gas). | Burning these fuels is a primary source of human-caused greenhouse gas emissions. |
| Greenhouse Gases | Gases in the atmosphere that trap heat (e.g., carbon dioxide, methane, nitrous oxide). | Increased concentration of these gases due to human activity enhances the greenhouse effect, causing warming. |
| Atmosphere | The layer of gases surrounding the Earth. | Greenhouse gases accumulate in the atmosphere, trapping heat and leading to global warming. |
| Releases | To allow to escape; emit. | Describes the action of fossil fuel combustion putting greenhouse gases into the atmosphere. |
Additional Information on Global Warming Causes
Global warming is a significant environmental challenge. While natural factors can influence climate, the current rapid warming trend is largely attributed to human activities. The burning of fossil fuels for energy, transportation, and industry is the single largest contributor to greenhouse gas emissions. Other significant human activities include deforestation, which reduces the number of trees that absorb carbon dioxide, and certain agricultural practices that release methane and nitrous oxide.
Understanding how these activities release greenhouse gases into the atmosphere is crucial for developing strategies to mitigate climate change. Measures such as transitioning to renewable energy sources, improving energy efficiency, promoting sustainable land use, and recycling are important steps in reducing the rate of global warming by limiting the release of these heat-trapping gases.
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Important Questions from Vocab Based Questions
Select whichever word you consider most appropriate for the blank (1)
Select whichever word you consider most appropriate for the blank (2)
Select whichever word you consider most appropriate for the blank (3)
Select whichever word you consider most appropriate for the blank (4)
Select whichever word you consider most appropriate for the blank (5)
