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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.

Medium · Level 2 · 25 questions

TOPIC PRACTICE

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Up to 25 questions from this page. Select your focus, then start.

25 questions

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  1. Abundance of hydrogen and helium
  2. Abundance of ice and ammonia
  3. Abundance of rock and metal
  4. Only dust and smoke
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  1. They are the smallest rocky planets
  2. They are closest to the Sun
  3. They are Earth's satellites
  4. They contain more gaseous materials like hydrogen and helium
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  1. Icy materials like water ammonia and methane are important in them
  2. They are made of pure rock
  3. They are located inside the Sun
  4. They formed near Earth
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  1. Only Earth's magnetism
  2. Temperature difference in the early solar system
  3. Moonlight
  4. Earth's oceans
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  1. Meteor is the Sun and meteorite is a planet
  2. Meteor is always a galaxy and meteorite is a star
  3. Meteor glows in the atmosphere and meteorite reaches the surface
  4. Both are only comet tails
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  1. It teaches planets to produce light
  2. It stops all planets completely
  3. It changes planets into moons
  4. It keeps planets bound in orbits by gravity
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  1. Liquid water and suitable temperature
  2. Being inside the Sun
  3. Being the largest planet
  4. A comet's tail
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  1. Because it has no gravity
  2. Because of dense atmosphere and strong greenhouse effect
  3. Because it is outside the Milky Way
  4. Because it is farthest from the Sun
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  1. Counting vegetation
  2. Height of sea waves
  3. Dating of meteorites and ancient rocks
  4. History of modern cities
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  1. It formed bodies like planets satellites asteroids and comets
  2. It immediately cooled Earth
  3. It ended all stars
  4. It formed the Milky Way
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  1. Kuiper Belt
  2. Asteroid Belt
  3. Oort Cloud
  4. Saturn's rings
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  1. Because it is not a body
  2. Because it does not receive light from the Sun
  3. Because it revolves around Earth and is not in an independent planetary orbit around the Sun
  4. Because it has no gravity
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  1. Comets are metal cities and asteroids are gas clouds
  2. Both are always made only of water
  3. Both are parts of Earth's atmosphere
  4. Comets are more icy and asteroids are more rocky
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  1. Origin from a common rotating nebula
  2. Each planet coming from a different galaxy
  3. All planets coming from the Moon
  4. Sun forming from oceans
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  1. It is only the surface of planets
  2. It provides gas and dust as material for new stars
  3. It is Earth's river system
  4. It is the Moon's shadow
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  1. Because oceans shine in it
  2. Because it reflects sunlight
  3. Because of heat produced by gravitational contraction
  4. Because it has become the Moon
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  1. Metals and silicates
  2. Rock and iron
  3. Sand and soil
  4. Volatile ices like water and methane
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  1. Heavy metals sank inward in molten Earth
  2. Light gases froze at the center
  3. Sea water changed into iron
  4. The Moon went inside Earth
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  1. They have no gravity at all
  2. Their high mass and gravity can bind more bodies
  3. They formed inside the Sun
  4. They are smaller than Earth
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  1. The Sun is the smallest body
  2. The Sun revolves around Earth
  3. Most mass is in the Sun and planets revolve around it
  4. The Sun is a satellite of the Moon
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  1. Only modern canals
  2. Only human made dams
  3. Only plant sap
  4. Contribution of water rich meteorites and comets
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  1. Dwarf planet
  2. Galaxy
  3. Main star
  4. Natural satellite
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  1. Ice can remain there because temperature is low
  2. There is no Sun there
  3. There is no gravity there
  4. All bodies there are stars
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  1. Planets at the centre and the Sun in the disk
  2. The Sun at the centre and planets in the disk
  3. The Moon at the centre and the Milky Way in the disk
  4. Comets at the centre and oceans in the disk
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  1. All planets formed at the same temperature
  2. The Moon distributed materials
  3. Different materials condensed at different places due to temperature gradient
  4. The galaxy colored the planets

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