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Geography

Star formation, formation of planets, and our solar system

In this Class 11 Geography topic from “The Origin and Evolution of the Earth,” students explore how stars form from vast clouds of gas and dust and how planets emerge from the material surrounding a young star. They examine the formation and organisation of the solar system, including the Sun, planets, satellites, asteroids and comets, while connecting these processes with Earth’s place, structure and early development within the wider universe.

Hard · Level 2 · 25 questions

TOPIC PRACTICE

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25 questions

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  1. Water came only from modern rivers
  2. Water may be linked with both outgassing and water rich outer bodies
  3. Water formed in the Sun's core
  4. Water formed from moonlight
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  1. The Moon separated directly from the Sun
  2. The Moon formed from Jupiter's gas
  3. The Moon formed from debris of a large body that hit Earth
  4. The Moon is a star captured from the Milky Way
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  1. Making Earth a gas giant
  2. Pushing Earth close to the Sun
  3. Ending all seasons
  4. Helping stabilize Earth's axis
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  1. Planets remain bound in orbits by the Sun's gravity
  2. The Sun revolves around planets
  3. Planets make their own light
  4. The Moon controls all planets
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  1. Both are only in Earth
  2. Most mass is in the Sun and much angular momentum is in planetary orbital motion
  3. Most mass is in the Moon
  4. Angular momentum has no importance
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  1. Planet
  2. Natural satellite
  3. Dwarf planet
  4. Asteroid
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  1. They are inner rocky planets
  2. They are on the Sun's surface
  3. They are satellites
  4. Icy materials like water ammonia and methane are more important in them
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  1. They can affect or delay cloud collapse
  2. They destroy all planets
  3. They make the Sun a satellite
  4. They make oceans
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  1. The time limit for gas giant formation becomes limited
  2. Earth immediately becomes a star
  3. Orbits of all planets break
  4. Moon becomes soil
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  1. Their gravity was lower and solar wind effect was stronger
  2. They were outside the Milky Way
  3. They were satellites of the Moon
  4. They had no rocks
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  1. Emission of light by planets
  2. Volcanic outgassing and later processes
  3. Gas coming from the Sun's core
  4. Breaking of the Oort Cloud
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  1. Suitable distance from the Sun and atmospheric conditions
  2. Rings of Jupiter
  3. Earth being closest to the Sun
  4. Earth being completely gaseous
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  1. Low gravity and icy surface
  2. Dense carbon dioxide rich atmosphere
  3. Position outside the Milky Way
  4. Revolution around the Moon
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  1. Very large mass
  2. Formation inside the Sun
  3. Lower mass and weaker atmospheric retention
  4. Gas giant nature
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  1. It tells the age of ancient rocks and meteorites
  2. It removes planets from orbit
  3. It cools the Sun
  4. It forms comet tails
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  1. Formation of planets and Sun from the same solar nebula material
  2. All planets having equal size
  3. All planets giving their own light
  4. Earth being the largest planet
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  1. Materials became solid at different distances according to temperature
  2. All materials froze equally at one place
  3. Planets were already ready
  4. The Moon made all materials
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  1. Planetary differentiation
  2. Comet tail
  3. Orbit clearing
  4. Light of solar wind
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  1. It can remove remaining disk gas and limit gas accretion
  2. It makes all planets satellites
  3. It makes the Sun a planetesimal
  4. It instantly makes Earth's oceans
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  1. They could not capture much hydrogen helium before gas dispersed
  2. They would instantly become stars
  3. They would collide with Earth and end
  4. They would move outside the Milky Way
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  1. They are linked with relatively cold distant regions
  2. They came from the Sun's core
  3. They formed from Earth's deserts
  4. They are cores of terrestrial planets
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  1. Collapse of gas dust cloud and star birth
  2. Modern ocean waves
  3. Formation of human cities
  4. Soil erosion of Earth
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  1. They formed from common nebular material
  2. They came from different galaxies
  3. They formed from modern volcanoes
  4. They formed from Moon soil
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  1. Moving iron nickel in the liquid outer core
  2. Fixed ice layer
  3. Comet tail
  4. Moon's surface
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  1. They keep a record of early solar system conditions
  2. They are modern cities of Earth
  3. They are all stars themselves
  4. They are hidden oceans inside the Sun

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