The Origin and Evolution of the Earth — Important Questions
CBSE · Class 11 · Geography
76 important questions from The Origin and Evolution of the Earth for CBSE Class 11 Geography, with answers. Part of the CBSE Class 11 Geography syllabus.
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Important Questions from The Origin and Evolution of the Earth
When did life begin to evolve on Earth?
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3,800 million years ago
According to the chapter, life is believed to have begun evolving around 3,800 million years ago.
Who provided evidence that the universe is expanding?
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Edwin Hubble
Edwin Hubble provided evidence in 1920 that the universe is expanding, supporting the Big Bang Theory.
How old are Earth's oceans?
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4 billion years
The chapter states that Earth's oceans were formed within 500 million years of the planet's formation, making them approximately 4,000 million years old.
What process contributed to oxygen flooding the atmosphere?
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Photosynthesis
Photosynthesis evolved around 2,500-3,000 million years ago and eventually led to oxygen saturating the oceans and atmosphere.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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