Cosmology and the Birth of the Earth Quiz
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Questions and Answers

What is the definition of a planet?

  • An object that orbits a star and is roughly spherical
  • An object that orbits a star and has moons
  • An object that orbits a star and has rings
  • An object that orbits a star, is roughly spherical, and has cleared its neighborhood of other objects (correct)

    • What holds stars together in immense groups called galaxies?

  • Nuclear fusion
  • Dark matter
  • Gravity (correct)
  • Magnetic force

    • What makes up objects in the universe?

  • Stars and Galaxies
  • Matter and Energy (correct)
  • Dark matter and Dark energy
  • Planets and Moons

    • Which entity in the universe is defined as the inherent ability of a region of space?

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

    Why is Pluto not considered a planet?

    <p>It has not cleared its orbit</p> Signup and view all the answers

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