The earth grew from the Big Bang through star and planet formation into a layered planet with air, water and life. Class 11 Geography Chapter 2 The Origin and Evolution of the Earth builds this idea step by step. These class 11 geography handwritten notes chapter 2 The Origin and Evolution of the Earth follow the 2026-27 NCERT.
- CBSE Class 11 Weightage: a scoring chapter in the Geography paper, asked in short and long answers.
- What the notes cover: early theories and the nebular hypothesis, the big bang theory and its stages, formation of stars and light years, formation of planets from planetesimals.
- Best for: quick revision before Class 11 exams and a base for CUET later.
You can read the complete class 11 geography handwritten notes for The Origin and Evolution of the Earth, with key terms, boxed definitions, and quick revision points, in the PDF below.
These handwritten notes are written by subject teachers, mapped to the 2026-27 NCERT, and checked against the last five years of CBSE Class 11 Geography papers.
Key Terms and Ideas in The Origin and Evolution of the Earth
These are the terms and ideas the exam asks about most. Learn each one so you can define it and use it in your answers.
| Term / Idea | What it means |
|---|---|
| Big Bang | explosion 13.7 billion years ago that started the universe |
| Nebula | huge cloud of hydrogen gas where stars form |
| Planetesimals | small bodies that accrete to build planets |
| Differentiation | sorting of earth material into layers by density |
| Degassing | release of gases and water vapour from the interior |
| Oceans | formed within 500 million years, about 4,000 million years old |
| Photosynthesis | process by which life added oxygen to the earth |
| Age of earth | about 4,600 million years |
What the The Origin and Evolution of the Earth Handwritten Notes Cover
This chapter follows the earth from the birth of the universe to the start of life. It covers the Big Bang, the formation of stars and planets, and the making of the earth. It then explains how the layers, air, oceans and life came to be.
- Early theories and the Nebular Hypothesis
- The Big Bang Theory and its stages
- Formation of stars and light years
- Formation of planets from planetesimals
- Layered structure and differentiation
- Origin of the moon by giant impact
- Evolution of atmosphere, oceans and life
The Origin and Evolution of the Earth Topic-wise Weightage for CBSE Class 11 Geography
Some parts of this chapter are asked more often than others. The table below shows which sub-topics to revise first, based on recent CBSE Class 11 question trends.
| Sub-topic | Weightage | CBSE Frequency |
|---|---|---|
| Big Bang Theory | High | asked most years |
| Stages in evolution of the earth | High | asked most years |
| Formation of planets | Medium | frequent |
| Evolution of atmosphere and hydrosphere | Medium | frequent |
| Origin of life and oxygen | Low | occasional |
How Collegedunia's Handwritten Notes Help You Revise The Origin and Evolution of the Earth
These notes are made for the night before the exam. They keep the facts short and easy to scan. Collegedunia maps every point to the 2026-27 NCERT.
- Clear handwriting: each topic is written in neat, easy-to-read handwriting.
- Boxed key terms: the main terms and definitions are boxed by hand for fast recall.
- Diagrams and tables: simple hand-drawn tables and charts make ideas clear.
- Colour-coded headings: new sub-topics stand out, so you find any section in seconds.
The Origin and Evolution of the Earth Self-Assessment Quiz
Try these quick questions after you read the notes. Tap each question to check your answer. They cover the points CBSE asks most often.
What figure represents the age of the earth?
(a) 4.6 million years (b) 13.7 billion years (c) 4.6 billion years (d) 13.7 trillion years
Answer: (c) 4.6 billion years - the earth is about 4,600 million years old.
Which is NOT related to forming the present atmosphere?
(a) solar winds (b) differentiation (c) degassing (d) photosynthesis
Answer: (b) differentiation - it sorted the earth into layers, not the air.
Life on the earth appeared around how many years ago?
(a) 13.7 billion (b) 3.8 million (c) 4.6 billion (d) 3.8 billion
Answer: (d) 3.8 billion - life began about 3,800 million years ago.
Who gave the concept of the steady state universe?
(a) Hubble (b) Hoyle (c) Kant (d) Laplace
Answer: (b) Hoyle - Fred Hoyle proposed the steady state alternative to the Big Bang.
What is a light year a measure of?
(a) time (b) mass (c) distance (d) speed
Answer: (c) distance - it is the distance light travels in one year.
How to Use These Handwritten Notes for Class 11 Geography Revision
Use these class 11 geography handwritten notes in two passes. Read them slowly once for the full chapter. Then, near the exam, read only the boxes and key terms for a fast recall.
- Read the notes once with the NCERT chapter open beside you.
- Say each key term and idea in your own words.
- Practise one long-answer question from a past paper.
- On the last day, revise only the key terms and the boxes.
Class 11 Geography Handwritten Notes for All Chapters
The table below links the class 11 geography handwritten notes for every chapter. Use it to jump to any other chapter's notes.
The Origin and Evolution of the Earth Class 11 Geography Handwritten Notes FAQs
Ques. Where can I download The Origin and Evolution of the Earth Class 11 Geography Handwritten Notes PDF?
Ans. You can download the The Origin and Evolution of the Earth Class 11 Geography Handwritten Notes PDF directly from this page. Both the Normal and HD versions are free.
Ques. Are these handwritten notes aligned with the 2026-27 NCERT?
Ans. Yes. These notes follow the current 2026-27 syllabus for Class 11 Geography. What is the process of differentiation in the formation of the earth.
Ques. How many pages is the Class 11 Geography The Origin and Evolution of the Earth Handwritten Notes PDF?
Ans. The notes run about 20 pages. They cover the full chapter with key terms, hand-drawn boxes, and a short self-assessment quiz.
Ques. What is the main idea of the 11th standard Geography chapter The Origin and Evolution of the Earth?
Ans. Differentiation is the sorting of the earth's material into layers based on density. Heavier material like iron sank to the centre and lighter material rose to the surface, giving the crust, mantle, outer core and inner core.
Ques. Are these The Origin and Evolution of the Earth notes enough for the CBSE Class 11 exam?
Ans. Yes, for revision. The Collegedunia handwritten notes cover every key point and exam term. Read them with the NCERT chapter and practise past questions.
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