1. Introduction: Why do we study Origin of the Earth? Early humans observed stars, galaxies, Earth, rivers, mountains, etc. This curiosity led to questions like: How was Earth formed? Where did the Sun, Moon, and planets come from? How did atmosphere and life originate? With the growth of scientific temperament (Renaissance period), geographers and scientists proposed various theories. 2. Classification of Theories of Origin of the Earth Theories are broadly divided into two categories: A. Early Theories (Hypotheses) Based on assumptions No proper scientific proof Also called Hypothetical theories B. Modern Theory Supported by scientific evidence Most accepted theory today 3. Early Theories (Hypotheses) Major Early Theories mentioned in NCERT: Gaseous Theory of Kant Nebular Hypothesis of Laplace Planetesimal Theory Tidal Hypothesis Revised Nebular Hypothesis (Otto Schmidt) 4. Gaseous Theory of Kant (Immanuel Kant) Basic Information Proposed by Immanuel Kant Around 1750 Influenced by Ne...
All in One Knowledge is an educational and informative blog that provides accurate and useful information on current affairs, education, environment, health, lifestyle, technology, and general knowledge in simple language