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Formation of Stars and Galaxies
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Formation of Stars and Galaxies

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Questions and Answers

What is the primary factor that determined the composition of objects in the protoplanetary disk?

  • Amount of solar wind
  • Gravitational forces
  • Presence of static electricity
  • Distance from the Sun (correct)
  • What role did solar wind play in the formation of the solar system?

  • It had no effect on the formation of the solar system
  • It prevented the formation of ice giant planets
  • It drove lighter molecules toward the outer part of the protoplanetary disk (correct)
  • It helped to drive heavier molecules toward the inner part of the protoplanetary disk
  • What is the primary mechanism by which objects in the early solar system grew in size?

  • Electromagnetic attraction
  • Gravitational attraction
  • Accretion (correct)
  • Nuclear reactions
  • Which of the following is a characteristic of terrestrial planets?

    <p>They have rocky mantles and metal cores</p> Signup and view all the answers

    What is the purpose of static electricity in the early solar system?

    <p>To collect particles into fluffy clumps</p> Signup and view all the answers

    What is the primary difference between Jovian and ice giant planets?

    <p>Their composition</p> Signup and view all the answers

    What is the primary reason why near infrared light is used to view stars that would otherwise be hidden by dust?

    <p>To capture the heat from the stars</p> Signup and view all the answers

    What is the role of static electricity in the early stages of planetary formation?

    <p>It helps accumulate dust particles into loose clumps</p> Signup and view all the answers

    What is the term for the disk that forms around a star during the planetary formation process?

    <p>Protoplanetary disk</p> Signup and view all the answers

    What do the dark rings in the protoplanetary disk represent?

    <p>Gaps where planets are forming</p> Signup and view all the answers

    What is the process by which small particles come together to form larger bodies in the solar system?

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

    What is the primary component of the material that forms the protoplanetary disk?

    <p>Dust particles</p> Signup and view all the answers

    What is the primary reason for the presence of dark rings in a protoplanetary disk?

    <p>Incipient planets are collecting dust and gas in their orbits</p> Signup and view all the answers

    What is the analogy in our own solar system for the dark rings in a protoplanetary disk?

    <p>Gaps in the rings of Saturn</p> Signup and view all the answers

    What is the primary composition of Jovian planets?

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

    What is the classification of planets like Earth, Mercury, Venus, and Mars based on their composition?

    <p>Terrestrial planets</p> Signup and view all the answers

    What is the purpose of illustrating the protoplanetary disk surrounding HL Tauri?

    <p>To compare with the rings of Saturn</p> Signup and view all the answers

    What is the analogous phenomenon to the aurora shown in Figure 22.3.3 (lower left)?

    <p>Northern lights on Earth</p> Signup and view all the answers

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