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qid 9479 · physics
Question: According to the Solar Nebular theory what are asteroids and comets?
- They are the shattered remains of collisions between planets.
- They are chunks of rock or ice that condensed long after the planets and moons had formed.
- They are solidified lava from the early solar system.
- They are leftover planetesimals that never accreted into planets.
- They are remnants of the original nebular cloud that didn't form into a planet.
- They are debris from the creation of the universe.
- They are fragments from the explosion of a massive star.
- They are chunks of rock or ice that were formed by the condensation of space dust.
- They are chunks of rock or ice that were expelled from planets by volcanoes.
- They are pieces of planets that were torn apart by gravitational forces.
Our answer: D. They are leftover planetesimals that never accreted into planets. Source quote machine-checked (exact quote)
How it was answered
Multi-step solver (maze), replayed by code
Current source
OpenStax, Astronomy 2e, Section 14.3 Formation of the Solar System
https://openstax.org/books/astronomy-2e/pages/14-3-formation-of-the-solar-system
“However, the story of the formation of the solar system was not complete at this stage; there were many planetesimals and other debris that did not initially accumulate to form the planets.”
Source quote machine-checked (exact quote)
Earlier version (superseded)
https://openstax.org/books/astronomy-2e/pages/14-3-formation-of-the-solar-system
Source weak (http_get_200_text_and_question_terms)
Earlier version (superseded)
No public source has been found for this card yet (3 places checked internally).
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