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History of Life on Earth

NIOS · Class 10 · Science & Tech

Step-by-step guide to study History of Life on Earth in NIOS Class 10 Science & Tech. Topics to cover, practice strategy, and time allocation.

44 questions38 flashcards5 concepts

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A comparison illustration showing the peppered moth (Biston betularia) in two scenarios: before industrialization (light moths camouflaged on lichen-covered trees, dark moths visible) and after indust
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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.

2
Day 3

Practice Problems

Solve textbook exercises and additional practice questions. There are 44 questions available for this chapter.

3
Day 4

Revise & Test

Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.

4
Day 7

Spaced Revision

Revisit History of Life on Earth after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.

What to Focus On

  • The universe formed 12 to 14 billion years ago.
  • The solar system came into existence 5-7 GY ago.
  • Earth is about 4.5 billion years old.

  • Life began around 3.8 GY ago, within the range 4.0 to 3.5 GY.
  • Cyanobacteria fossils in Australia are dated to 3.5 GY.
  • Oparin and Haldane proposed the primordial soup theory.

  • Life began with unicellular prokaryotes.
  • Prokaryotes dominated for nearly 3 billion years.
  • Photosynthesis increased atmospheric oxygen.

Common Mistakes to Avoid

The primitive earth had oxygen just like the present atmosphere.

The Oparin-Haldane theory and the hydrothermal vent hypothesis are the same theory.

Miller and Urey produced living cells in the laboratory.

Memory Tips

Age of the universe, solar system, Earth, and early bombardment

Primitive Earth atmosphere gases

Oparin-Haldane primordial soup theory

Miller-Urey experiment

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Frequently Asked Questions

What are the important topics in History of Life on Earth for NIOS Class 10 Science & Tech?
Key topics in History of Life on Earth include Major Events in Earth's History, History of Life on Earth - Complete Overview, History of Life on Earth Timeline. These are the concepts NIOS Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in History of Life on Earth — NIOS Class 10 Science & Tech?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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