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Chapter Summary

History of Life on Earth

NIOS · Class 10 · Science & Tech

Summary of History of Life on Earth for NIOS Class 10 Science & Tech. Key concepts, important points, and chapter overview.

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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Overview

The history of life on Earth explains how the universe, the solar system, Earth, and living organisms developed over long periods of time. Earth formed about 4.5 billion years ago and was first very hot and hostile to life. Life is generally believed to have begun nearly 3.8 billion years ago in sim

Key Concepts

The universe formed about 12

The universe formed about 12 to 14 billion years ago by the Big Bang. The solar system formed 5 to 7 billion years ago. Earth formed about 4.5 billion

Early Earth was extremely hot

Early Earth was extremely hot, had frequent meteorite bombardment, and had a reducing atmosphere with methane, ammonia and hydrogen cyanide. Oxygen wa

Life is believed to have originated

Life is believed to have originated not before 4.0 billion years ago and not later than 3.5 billion years ago. A common estimate places the origin nea

J

J. B. S. Haldane and A. I. Oparin proposed that life began in shallow seas where organic compounds collected in a primordial soup. These compounds for

Stanley Miller and Harold Urey produced

Stanley Miller and Harold Urey produced amino acids by passing an electric charge through a flask containing methane, ammonia and hydrogen. This suppo

Learning Objectives

  • Describe the physical conditions of primitive Earth
  • Explain the origin of life using Oparin-Haldane theory and related ideas
  • Understand the role of Miller and Urey's experiment in supporting chemical evolution
  • Explain Darwin's main contributions to the theory of evolution
  • Describe natural selection and Neo-Darwinism

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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