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'Big-Bang theory' explains the origin of
1. Mammals
2. Ice-age
3. Universe
4. Ocean

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Correct Answer - Option 3 : Universe

The correct answer is Universe.

  • 'Big-Bang theory' explains the origin of the Universe.
  • Big-Bang theory:
    • Big Bang Theory is about the beginning of the Universe.
    • It suggests that about 1370 crore (13.7 billion) years ago, all matter and energy in the universe was intensive into an area smaller than an atom.
    • At this immediate, matter, energy, space and time did not exist.
    • Then abruptly with a bang, the Universe began to expand at an incredible rate and matter, energy, space and time came into being.
    • As the Universe extended, matter began to coalesce into gas clouds and the stars and planets.
    • Some scientists reckon that this expansion is finite and will do day cease.
    • After this point in time, the Universe will unleash to collapse until a Big Crunch occurs.


  • Mammals:
    • Mammals include humans and all other animals that are warm-blooded vertebrates (vertebrates have backbones) with hair.
    • They feed their young with milk and have a more well-developed brain than other types of animals.
  • Ice-age:
    • Ice age, also called glacial age, any geologic period during which thick ice sheets cover vast areas of land.
    • Such periods of large-scale glaciation may last several million years and drastically reshape the surface features of entire continents.
    • A number of major ice ages have occurred throughout Earth history.
  • Universe:
    • The universe is a huge wide-open space that holds everything from the smallest particle to the biggest galaxy.
    • They use a special instrument called a spectroscope to tell whether an object is moving away from Earth or toward Earth.
    • Based on the information from this instrument, scientists have learned that the universe is still growing outward in every direction.
    • Scientists believe that about 13.7 billion years ago, a powerful explosion called the Big Bang happened.
  • Ocean:
    • About three – a fourth of the earth is covered by Hydrosphere.
    • The hydrosphere covers nearly 71% of the total surface area of the earth.
    • The Hydrosphere is divided into Oceans, Inland Seas, Small enclosed seas, Bays, etc. on the basis of their size and location.
    • The four major oceans of the earth are the Pacific Ocean, Atlantic Ocean, Indian Ocean and the Arctic Ocean.

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