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With reference to the evolution of the Earth's atmosphere, consider the following statements:
(A) The earliest atmosphere of the Earth is believed to have been composed of primarily Hydrogen and Helium.
(B) Outgassing from volcanos led to predomination of water vapour in the Earth's atmosphere.
(C) Permanent gases in the current atmosphere include Nitrogen, Ozone and Water Vapour.
Which of the above statements is/are correct?
- a)(A) and (B)
- b)(B) and (C)
- c)(A) and (C)
- d)All of the above
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
With reference to the evolution of the Earth's atmosphere, consider th...
Earth's original atmosphere was probably just hydrogen and helium because these were the main gases in the dusty, gassy disk around the Sun from which the planets formed. The Earth and its atmosphere were very hot. Molecules of hydrogen and helium move really fast, especially when warm. Therefore, statement (A) is correct.
Earth's second atmosphere was formed from the outgassing of volcanoes and was composed mainly of water vapour (80%), carbon dioxide (10%), and nitrogen (5%). Therefore, statement (B) is correct.
The atmosphere is composed of a mix of several different gases in differing amounts. The permanent gases whose percentages do not change from day to day are nitrogen, oxygen and argon. Nitrogen accounts for 78% of the atmosphere, oxygen 21% and argon 0.9%. Gases like carbon dioxide, nitrous oxides, methane, and ozone are trace gases that account for about a tenth of one per cent of the atmosphere. Water vapour is unique in that its concentration varies from 0-4% of the atmosphere depending on where you are and what time of the day it is. Therefore, statement (C) is incorrect.
Most Upvoted Answer
With reference to the evolution of the Earth's atmosphere, consider th...
Overview of Earth's Atmospheric Evolution
Understanding the evolution of Earth's atmosphere involves analyzing the composition at different stages. Let's evaluate the statements given:
(A) The earliest atmosphere of the Earth is believed to have been composed of primarily Hydrogen and Helium.
- This statement is **correct**.
- The primordial atmosphere likely consisted mainly of Hydrogen and Helium, the two lightest elements, formed shortly after the planet's creation.
(B) Outgassing from volcanos led to predominance of water vapour in the Earth's atmosphere.
- This statement is **correct**.
- As the Earth cooled, volcanic activity released gases, including water vapor, carbon dioxide, and others. Water vapor became a significant component, especially as the planet cooled and water condensed into oceans.
(C) Permanent gases in the current atmosphere include Nitrogen, Ozone, and Water Vapour.
- This statement is **incorrect**.
- While Nitrogen is a permanent gas, Ozone and Water Vapor are not considered permanent gases. Ozone is a trace gas, and Water Vapor varies significantly in concentration.
Conclusion
Given this analysis, statements (A) and (B) are correct, while (C) is not. Therefore, the correct answer is option **(A) and (B)**. The confusion might arise from the classification of permanent gases, leading to the misunderstanding of statement (C).
Understanding the evolution of Earth's atmosphere involves analyzing the composition at different stages. Let's evaluate the statements given:
(A) The earliest atmosphere of the Earth is believed to have been composed of primarily Hydrogen and Helium.
- This statement is **correct**.
- The primordial atmosphere likely consisted mainly of Hydrogen and Helium, the two lightest elements, formed shortly after the planet's creation.
(B) Outgassing from volcanos led to predominance of water vapour in the Earth's atmosphere.
- This statement is **correct**.
- As the Earth cooled, volcanic activity released gases, including water vapor, carbon dioxide, and others. Water vapor became a significant component, especially as the planet cooled and water condensed into oceans.
(C) Permanent gases in the current atmosphere include Nitrogen, Ozone, and Water Vapour.
- This statement is **incorrect**.
- While Nitrogen is a permanent gas, Ozone and Water Vapor are not considered permanent gases. Ozone is a trace gas, and Water Vapor varies significantly in concentration.
Conclusion
Given this analysis, statements (A) and (B) are correct, while (C) is not. Therefore, the correct answer is option **(A) and (B)**. The confusion might arise from the classification of permanent gases, leading to the misunderstanding of statement (C).
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With reference to the evolution of the Earth's atmosphere, consider the following statements:(A) The earliest atmosphere of the Earth is believed to have been composed of primarily Hydrogen and Helium.(B) Outgassing from volcanos led to predomination of water vapour in the Earth's atmosphere.(C) Permanent gases in the current atmosphere include Nitrogen, Ozone and Water Vapour.Which of the above statements is/are correct?a)(A) and (B)b)(B) and (C)c)(A) and (C)d)All of the aboveCorrect answer is option 'A'. Can you explain this answer?
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With reference to the evolution of the Earth's atmosphere, consider the following statements:(A) The earliest atmosphere of the Earth is believed to have been composed of primarily Hydrogen and Helium.(B) Outgassing from volcanos led to predomination of water vapour in the Earth's atmosphere.(C) Permanent gases in the current atmosphere include Nitrogen, Ozone and Water Vapour.Which of the above statements is/are correct?a)(A) and (B)b)(B) and (C)c)(A) and (C)d)All of the aboveCorrect answer is option 'A'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about With reference to the evolution of the Earth's atmosphere, consider the following statements:(A) The earliest atmosphere of the Earth is believed to have been composed of primarily Hydrogen and Helium.(B) Outgassing from volcanos led to predomination of water vapour in the Earth's atmosphere.(C) Permanent gases in the current atmosphere include Nitrogen, Ozone and Water Vapour.Which of the above statements is/are correct?a)(A) and (B)b)(B) and (C)c)(A) and (C)d)All of the aboveCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for With reference to the evolution of the Earth's atmosphere, consider the following statements:(A) The earliest atmosphere of the Earth is believed to have been composed of primarily Hydrogen and Helium.(B) Outgassing from volcanos led to predomination of water vapour in the Earth's atmosphere.(C) Permanent gases in the current atmosphere include Nitrogen, Ozone and Water Vapour.Which of the above statements is/are correct?a)(A) and (B)b)(B) and (C)c)(A) and (C)d)All of the aboveCorrect answer is option 'A'. Can you explain this answer?.
With reference to the evolution of the Earth's atmosphere, consider the following statements:(A) The earliest atmosphere of the Earth is believed to have been composed of primarily Hydrogen and Helium.(B) Outgassing from volcanos led to predomination of water vapour in the Earth's atmosphere.(C) Permanent gases in the current atmosphere include Nitrogen, Ozone and Water Vapour.Which of the above statements is/are correct?a)(A) and (B)b)(B) and (C)c)(A) and (C)d)All of the aboveCorrect answer is option 'A'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about With reference to the evolution of the Earth's atmosphere, consider the following statements:(A) The earliest atmosphere of the Earth is believed to have been composed of primarily Hydrogen and Helium.(B) Outgassing from volcanos led to predomination of water vapour in the Earth's atmosphere.(C) Permanent gases in the current atmosphere include Nitrogen, Ozone and Water Vapour.Which of the above statements is/are correct?a)(A) and (B)b)(B) and (C)c)(A) and (C)d)All of the aboveCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for With reference to the evolution of the Earth's atmosphere, consider the following statements:(A) The earliest atmosphere of the Earth is believed to have been composed of primarily Hydrogen and Helium.(B) Outgassing from volcanos led to predomination of water vapour in the Earth's atmosphere.(C) Permanent gases in the current atmosphere include Nitrogen, Ozone and Water Vapour.Which of the above statements is/are correct?a)(A) and (B)b)(B) and (C)c)(A) and (C)d)All of the aboveCorrect answer is option 'A'. Can you explain this answer?.
Solutions for With reference to the evolution of the Earth's atmosphere, consider the following statements:(A) The earliest atmosphere of the Earth is believed to have been composed of primarily Hydrogen and Helium.(B) Outgassing from volcanos led to predomination of water vapour in the Earth's atmosphere.(C) Permanent gases in the current atmosphere include Nitrogen, Ozone and Water Vapour.Which of the above statements is/are correct?a)(A) and (B)b)(B) and (C)c)(A) and (C)d)All of the aboveCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Software Development.
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