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Subjects

Geography

Early and modern theories

In Class 11 Geography, this topic explores how explanations for the origin and evolution of the Earth developed from early philosophical ideas to modern scientific theories. Students compare major hypotheses, including nebular explanations, and examine the astronomical, geological, and physical evidence used to understand the formation of the solar system and Earth. The topic also shows how observations, discoveries, and improved scientific models continually refine our understanding of the planet.

Medium · Level 4 · 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. Modern solar nebula theory
  2. Biodiversity theory
  3. Water cycle theory
  4. Demographic transition theory
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  1. Cosmic background radiation and red shift of galaxies
  2. River meanders and flood plains
  3. Soil fertility and crop rotation
  4. Local wind and sea breeze
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  1. Such a close event is considered extremely rare
  2. Stars never move
  3. The Sun has no gravity
  4. Planets never orbit
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  1. Modern solar nebula theory
  2. Tidal theory
  3. Jeans theory
  4. Jeffreys theory
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  1. Common original motion of the rotating solar nebula
  2. Direction of ocean currents
  3. Direction of Earth's rivers
  4. Direction of volcanic ash
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  1. Accretion-based modern theory
  2. Steady state theory
  3. Tidal ocean theory
  4. Climate change theory
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  1. The average form of the universe remains the same in time and space
  2. The universe is limited only to Earth
  3. There are no galaxies in the universe
  4. The universe was formed yesterday
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  1. Origin of the universe and recession of galaxies
  2. River erosion and deposition
  3. Soil layers and crops
  4. Monsoon and local temperature
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  1. Their main ideas and scientific limitations
  2. Only spelling of their names
  3. Only details of river valleys
  4. Only modern politics
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  1. Big Bang - red shift
  2. Tidal theory - monsoon rainfall
  3. Steady state - river deposition
  4. Nebular - soil erosion
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  1. Differentiation
  2. Big Bang
  3. Red shift
  4. Steady state
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  1. Modern solar nebula theory
  2. Steady state theory
  3. Tidal theory
  4. Biological evolution theory
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  1. Big Bang assumes a beginning, steady state assumes average uniformity
  2. Both explain only Earth's layers
  3. Both explain origin of rivers
  4. Both are planetesimal theories
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  1. Because they can join small bodies into larger bodies
  2. Because they cool the Sun
  3. Because they dry oceans
  4. Because they stop the universe
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  1. Release of volcanic and internal gases
  2. Red shift of galaxies
  3. Light of a nearby star
  4. River sediments
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  1. Early nebular theories
  2. Plate tectonic theories
  3. Population theories
  4. Climate classification
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  1. Modern solar nebula theory
  2. Tidal theory
  3. Old Jeans theory
  4. Old Jeffreys theory
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  1. Theories may be improved or changed
  2. All theories always remain unchanged
  3. Evidence is never valued
  4. Study of geography stops
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  1. Hot early Earth, differentiation, cooling, crust formation
  2. Crust formation, Big Bang, humans, nebula
  3. River formation, Sun formation, gas cloud, protoplanet
  4. Monsoon, ocean, universe, star
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  1. Solar nebula and accretion-related theory
  2. Biological genetics theory
  3. Human migration theory
  4. Agricultural development theory
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  1. Modern solar nebula theory
  2. Steady state theory
  3. Only tidal theory
  4. Only old nebular hypothesis
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  1. Small rocky bodies left from planet formation
  2. Broken oceans of Earth
  3. Frozen rays of the Sun
  4. Cosmic background radiation
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  1. From matter ejected by collision between the Sun and a comet
  2. From a flat disk of gas and dust
  3. From cosmic background radiation
  4. From Earth's oceans
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  1. Ocean tides
  2. Gravitation
  3. Biological evolution
  4. Monsoon wind
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  1. Oceans
  2. Rivers
  3. Planets
  4. Glaciers

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