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Geography

Evolution of the earth

In this Class 11 Geography topic from “The Origin and Evolution of the Earth,” students trace how Earth formed and changed over geological time. They learn about the early solar nebula, the separation of materials within the young planet, the development of the crust, atmosphere and oceans, and the gradual emergence of life. The topic connects major stages of Earth’s evolution with the geological processes that shaped its present structure.

Medium · Level 5 · 25 questions

TOPIC PRACTICE

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25 questions

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  1. Atmosphere kept changing over time
  2. Atmosphere always remained same
  3. Atmosphere never formed
  4. Oxygen was only in core
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  1. It retained gases and pulled heavy materials toward the centre
  2. It made oceans into the Sun
  3. It erased ozone
  4. It created life first
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  1. Impacts molten surface and volcanic activity
  2. Permanent forests and modern cities
  3. Fully developed ozone and calm surface
  4. Low temperature and permanent ice
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  1. Because it was also linked with oxygen ozone water and surface conditions
  2. Because it was linked only with human industry
  3. Because it had no atmospheric role
  4. Because it happened on the Moon
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  1. Connecting events through cause effect and sequence
  2. Memorising events without sequence
  3. Studying only modern human history
  4. Remembering only names
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  1. Necessary physical and chemical conditions form before life
  2. Life came first and water came later
  3. Atmosphere had no relation with water
  4. Biosphere made the crust
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  1. They cooled Earth immediately
  2. They formed oceans first
  3. They ended gravity
  4. They increased heat and made differentiation of materials easier
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  1. Solar wind and cold rainfall
  2. Impacts radioactive heat and gravitational compression
  3. Vegetation and rivers
  4. Ozone and modern air
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  1. Rain separated materials
  2. Photosynthesis formed the core
  3. Materials rearranged according to density
  4. Oceans formed the mantle
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  1. Being heavy metallic materials, they accumulated at the centre
  2. They became water vapour and entered the atmosphere
  3. They dissolved in oceans and became salt
  4. They changed into the ozone layer
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  1. Presence of dense forests
  2. Easy removal of light gases by solar wind
  3. Depth of permanent oceans
  4. Development of complex organisms
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  1. It formed through gas release from Earth's interior
  2. It formed only from solar wind
  3. It formed only from modern plants
  4. It formed from Moon soil
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  1. It cooled the core
  2. It transferred gases from Earth's interior to the outer atmosphere
  3. It melted the oceans
  4. It produced solar wind
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  1. At high temperatures, water vapour could not condense into stable liquid water
  2. Earth's gravity began acting only after cooling
  3. The amount of oxygen in the atmosphere suddenly increased greatly
  4. Volcanic eruptions stopped completely
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  1. Surface becoming sufficiently cool and solid
  2. Ending of all gases
  3. Core coming to the surface
  4. Ozone being fully developed earlier
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  1. Interaction of atmosphere and hydrosphere
  2. Collision of core and Moon
  3. Meeting of solar wind and biosphere
  4. Union of crust and Sun
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  1. Simple organic substances formed first and then origin of life became possible
  2. Humans formed first and then chemicals formed
  3. Ozone formed first and then Earth formed
  4. Forests formed first and then oceans formed
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  1. They only stored salt
  2. They acted as a medium for mixing and reacting chemicals
  3. They created gravity
  4. They rotated the Moon
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  1. They were like modern humans
  2. They formed only on land
  3. They were simple and adapted to primitive energy conditions
  4. They depended on ozone
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  1. Because sufficient free oxygen was not available
  2. Because oceans were very deep
  3. Because the core was light
  4. Because the crust did not rotate
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  1. Oxygen improved energy use and ozone protection conditions
  2. Oxygen dried oceans
  3. Oxygen stopped solar wind
  4. Oxygen brought the core outside
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  1. It made land surface safer from ultraviolet radiation
  2. It ended all oceans
  3. It reduced gravity
  4. It cooled the core
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  1. Because conditions like water atmosphere and solid surface had to form first
  2. Because life first formed the Sun
  3. Because crust formed after life
  4. Because solar wind itself was life
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  1. Solid crust provided a surface for water accumulation
  2. Hydrosphere formed the core
  3. Lithosphere is only gas
  4. Both have no relation with life
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  1. Rainfall and development of hydrosphere
  2. Breaking of the core
  3. Formation of solar wind
  4. Disappearance of the Moon

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