The Origin and Evolution of the Earth
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Questions and Answers

What is the name of the hypothesis proposed by Immanuel Kant and revised by Laplace in 1796?

  • Planetary Hypothesis
  • Nebular Hypothesis (correct)
  • Solar Hypothesis
  • Galactic Hypothesis
  • Who revised the Nebular Hypothesis in 1950, differing in details from Laplace's original idea?

  • Albert Einstein and Nikola Tesla
  • Charles Darwin and Gregor Mendel
  • Isaac Newton and Galileo Galilei
  • Otto Schmidt and Carl Weizascar (correct)
  • In the context of the origin of the Earth, what were the solar nebula primarily composed of?

  • Hydrogen and Helium (correct)
  • Argon and Neon
  • Oxygen and Nitrogen
  • Carbon Dioxide and Methane
  • What process led to the formation of a disk-shaped cloud around the sun according to the revised Nebular Hypothesis?

    <p>Friction and Collision of Particles</p> Signup and view all the answers

    Which two scientists proposed a revision to the Nebular Hypothesis in 1950, introducing the idea of a solar nebula?

    <p>Otto Schmidt and Carl Weizascar</p> Signup and view all the answers

    Which philosopher initially proposed the idea that planets were formed out of material associated with a youthful sun?

    <p>Immanuel Kant</p> Signup and view all the answers

    What theory is considered the most popular regarding the origin of the universe?

    <p>Big Bang Theory</p> Signup and view all the answers

    Who provided evidence that the universe is expanding?

    <p>Edwin Hubble</p> Signup and view all the answers

    What event is believed to have taken place 13.7 billion years before the present?

    <p>Big Bang Event</p> Signup and view all the answers

    What is the significance of the temperature dropping to 4,500 K within 300,000 years from the Big Bang event?

    <p>Becoming transparent</p> Signup and view all the answers

    What concept considered the universe to be roughly the same at any point of time, as mentioned in the text?

    <p>Steady State Theory</p> Signup and view all the answers

    What began to develop by accumulation of hydrogen gas in the form of a very large cloud called nebula?

    <p>Galaxies</p> Signup and view all the answers

    What process gives rise to the formation of stars according to the text?

    <p>Accretion of clumps of gas</p> Signup and view all the answers

    What is believed to have taken place some 5-6 billion years ago as mentioned in the text?

    <p>Formation of stars</p> Signup and view all the answers

    What gave rise to differences in gravitational forces in the early universe?

    <p>&quot;Initial Density&quot; differences</p> Signup and view all the answers

    "The galaxies spread over vast distances that are measured in thousands of light-years." What is measured in light-years?

    <p>&quot;Distances between galaxies&quot;</p> Signup and view all the answers

    What process contributed to the saturation of oceans with oxygen?

    <p>Photosynthesis</p> Signup and view all the answers

    When did oxygen begin to flood the atmosphere according to the text?

    <p>2,000 million years ago</p> Signup and view all the answers

    What is the modern scientific view on the origin of life according to the passage?

    <p>A chemical reaction that generated complex organic molecules</p> Signup and view all the answers

    Where is the record of life on Earth found according to the text?

    <p>In rocks as fossils</p> Signup and view all the answers

    What structures related to blue algae have been found in ancient geological formations?

    <p>Microscopic structures</p> Signup and view all the answers

    According to the Geological Time Scale, when did life presumably begin to evolve?

    <p>3,800 million years ago</p> Signup and view all the answers

    What caused the separation of materials inside the earth during its primordial stage?

    <p>Increase in density</p> Signup and view all the answers

    Which elements are considered to have contributed to the early atmosphere of Earth?

    <p>Hydrogen and Helium</p> Signup and view all the answers

    What process led to the formation of oceans on Earth?

    <p>Degassing</p> Signup and view all the answers

    At what point did life begin to evolve according to the text?

    <p>Around 3,800 million years ago</p> Signup and view all the answers

    What played a role in modifying the composition of Earth's atmosphere according to the text?

    <p>Photosynthesis</p> Signup and view all the answers

    Which layer is the densest inside the Earth?

    <p>Inner core</p> Signup and view all the answers

    How did the separation of materials inside the Earth affect its evolution?

    <p>Caused differentiation into layers</p> Signup and view all the answers

    What marked the first stage in the evolution of Earth's atmosphere?

    <p>Loss of primordial atmosphere</p> Signup and view all the answers

    'Degassing' refers to which process mentioned in the text?

    <p>'Outpouring' of gases and water vapor from Earth's interior</p> Signup and view all the answers

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