Earth's Origin and Evolution — Flashcards
Gujarat Board · Class 11 · Geography
24 flashcards for Earth's Origin and Evolution (Gujarat Board Class 11 Geography) to test yourself on key terms and facts.
Interactive on Super Tutor
Studying Earth's Origin and Evolution? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for flashcards and more.
Free trial, no card needed.
According to Hindu mythology, what supports the Earth?
Answer
According to Hindu mythology, the Earth rests on the back of four big elephants, which stand on the back of a great tortoise (Kurma). Some beliefs also mention that Earth rests on the head of Sheshnag…
What are the three main categories of theories about Earth's origin?
Answer
1. Monistic Hypothesis - Earth originated from a single star (one parent hypothesis) 2. Binary Star/Dualistic Hypothesis - Earth originated from collision between two stars 3. Theory based on gaseous …
Who presented the Nebular Hypothesis and when?
Answer
The Nebular Hypothesis was first presented by German philosopher Immanuel Kant in 1755. Later, in 1796, French mathematician Pierre-Simon Laplace modified and improved this hypothesis.
Explain the main concept of the Nebular Hypothesis.
Answer
According to the Nebular Hypothesis, there was initially a cool, motionless gaseous cloud in space. Gravitational attraction caused particles to collide and heat up, forming a rotating hot nebula. As …
What is the Tidal Hypothesis and who proposed it?
Answer
The Tidal Hypothesis was proposed by British geographers Sir James Jeans and Sir Harold Jeffreys in 1919. It suggests that a massive roaming star passed close to the Sun, creating a tidal bulge on the…
Who proposed the Planetesimal Hypothesis and what does it suggest?
Answer
T.C. Chamberlain and Forest Ray Moulton (American scientists) presented the Planetesimal Hypothesis in 1900. It suggests that a randomly moving star passed near the Sun, and its gravitational force pu…
What is the Inter Stellar Dust Hypothesis?
Answer
Proposed by Russian scientist Otto Schmidt in 1943, this hypothesis suggests that the primitive Sun already existed. About 600 crore years ago, hydrogen, helium gases, and dust clouds were attracted t…
How many planets are in our solar system and what are the two main categories?
Answer
Our solar system has 8 planets. They are divided into two categories: 1. Terrestrial planets (rocky): Mercury, Venus, Earth, Mars 2. Jovian planets (gas giants): Jupiter, Saturn, Uranus, Neptune…
+16 more flashcards
Practise AllFrequently Asked Questions
What are the important topics in Earth's Origin and Evolution for Gujarat Board Class 11 Geography?
How many flashcards are available for Earth's Origin and Evolution?
How should I revise Earth's Origin and Evolution for Class 11 exams?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Earth's Origin and Evolution
For serious students
Get the full Earth's Origin and Evolution chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for Gujarat Board Class 11 Geography. Free to start, no card needed.