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Subjects

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.

Expert · Level 2 · 25 questions

TOPIC PRACTICE

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  1. As a changing system involving physical chemical and biological effects
  2. As a thing formed once and never changed
  3. Only a store of oxygen
  4. Only a result of solar wind
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  1. Hydrosphere also affected atmosphere after forming
  2. Hydrosphere has no relation with atmosphere
  3. Hydrosphere formed core
  4. Hydrosphere formed from solar wind
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  1. Cool surface but active interior
  2. Complete ozone but low oxygen
  3. Life first but water later
  4. Oceans first but Earth later
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  1. Primitive atmosphere was chemically different from today
  2. Present atmosphere existed from the beginning
  3. Ozone layer was very old and complete
  4. Life was human like
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  1. Biological role in atmospheric oxygen change
  2. Metals moving into core
  3. Planetesimal impacts
  4. Gas loss by solar wind
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  1. Water provided medium and ozone provided protection
  2. Water formed core and ozone formed gravity
  3. Both created solar wind
  4. Both removed first atmosphere
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  1. Because each stage of development created conditions necessary for the next stage
  2. Because all geological and atmospheric events were unrelated to one another
  3. Because only one cause was sufficient to make Earth suitable for life
  4. Because no conditions on Earth developed before life originated
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  1. Atmospheric evolution involved both loss and rebuilding
  2. Atmosphere never changed
  3. Oceans already existed
  4. Life formed the first atmosphere
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  1. Internal layers mainly formed by differentiation and external spheres by gas water and life processes
  2. Both formed only by ozone
  3. Both formed only by human activity
  4. Both formed only by solar wind
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  1. Ozone protection and favourable land conditions
  2. Core coming to surface
  3. Increase of solar wind
  4. Return of first atmosphere
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  1. Internal differentiation outer atmosphere hydrosphere and biosphere were sequentially connected
  2. Each event was completely independent
  3. Only oceans were the cause
  4. Only ozone was the cause
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  1. Explanation of high temperature and molten state of early Earth
  2. Land life protection by ozone
  3. Oxygen increase by photosynthesis
  4. Gas dissolution in oceans
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  1. Treating one event as the complete cause
  2. Linking physical and chemical stages
  3. Examining the interaction of atmosphere and hydrosphere
  4. Understanding the effect of the biosphere on the atmosphere
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  1. Biological accumulation of free oxygen
  2. Dissolution of gases in water
  3. Condensation of water vapour
  4. Accumulation of rainwater
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  1. A hot, active body became a life-supporting system through physical, chemical and biological processes
  2. Earth has remained stable and similar to its present form since its formation
  3. Life originated before the formation of Earth
  4. Oceans had no role in Earth’s evolution
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  1. Heat differentiation outgassing hydrosphere chemical evolution photosynthesis ozone biosphere
  2. Biosphere ozone first atmosphere planetesimals
  3. Oceans humans crust solar wind
  4. Ozone core rainfall first life
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  1. Planetesimal impacts then heat then melting then density based separation
  2. Oceans then core then crust then impacts
  3. Photosynthesis then heat then first atmosphere
  4. Ozone then planetesimals then water vapour
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  1. Movement of heavy materials toward the centre would be harder to explain
  2. Ozone layer would form first
  3. Hydrosphere would form immediately
  4. Photosynthesis would start first
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  1. Because lighter materials remaining in upper parts was equally important
  2. Because it stopped photosynthesis
  3. Because it created solar wind
  4. Because it formed ozone first
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  1. Materials inside Earth were organised by chemistry and density
  2. Oceans formed the core
  3. Life formed the crust
  4. Ozone kept metals upward
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  1. External effect of solar wind was also a necessary cause
  2. Oceans were already making life
  3. Ozone already removed gases
  4. Core swallowed gases
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  1. Gases released from inside became the basis of the outer atmosphere
  2. Outer ozone became inner core
  3. Oceans formed the mantle
  4. Solar wind turned crust into gas
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  1. Formation of permanent liquid water from vapour would remain difficult
  2. Core would immediately become light
  3. Solar wind would stop
  4. Ozone would become complete first
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  1. Space for large water accumulation would be limited
  2. First atmosphere would become strong
  3. Ozone layer would break immediately
  4. Life would first become human
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  1. Atmospheric evolution was affected by the hydrosphere
  2. Atmosphere was completely fixed
  3. Hydrosphere had no relation with atmosphere
  4. Solar wind made hydrosphere

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