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 (A)</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 (A)</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 (C)</p> Signup and view all the answers

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

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

Who provided evidence that the universe is expanding?

<p>Edwin Hubble (A)</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 (B)</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 (A)</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 (D)</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 (A)</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 (B)</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 (B)</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 (C)</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; (D)</p> Signup and view all the answers

What process contributed to the saturation of oceans with oxygen?

<p>Photosynthesis (D)</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 (C)</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 (D)</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 (D)</p> Signup and view all the answers

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

<p>Microscopic structures (D)</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 (C)</p> Signup and view all the answers

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

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

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

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

What process led to the formation of oceans on Earth?

<p>Degassing (D)</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 (B)</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 (C)</p> Signup and view all the answers

Which layer is the densest inside the Earth?

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

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

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

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

<p>Loss of primordial atmosphere (C)</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 (A)</p> Signup and view all the answers

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