Formation of the Inner Solar System

Which of the following best describes the process of terrestrial planet formation in the inner solar system?

• Accretion of gas and dust into large gas giants

• Accretion of solid particles into planetesimals and then into protoplanets

• Capture of icy bodies from the Kuiper Belt

• Direct collapse of gas clouds into rocky planets

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DOK Level 1: Recall

Explain how the process of differentiation affected the internal structure of terrestrial planets.

• Differentiation caused the planets to lose their atmospheres.

• Differentiation led to the formation of a layered structure with a dense core, mantle, and crust.

• Differentiation resulted in the planets becoming gas giants.

• Differentiation caused the planets to break apart into smaller bodies.

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DOK Level 2: Skill/Concept

Describe the role of gravity in the formation of gas giants in the outer solar system.

• Gravity caused the gas giants to form from the collision of rocky planetesimals.

• Gravity allowed gas giants to capture large amounts of hydrogen and helium from the solar nebula.

• Gravity had no significant role in the formation of gas giants.

• Gravity caused the gas giants to form from the evaporation of icy bodies.

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DOK Level 2: Skill/Concept

Evaluate the impact of Jupiter's gravity on the orbits of other objects in the solar system.

• Jupiter's gravity has no impact on other objects in the solar system.

• Jupiter's gravity helps to stabilize the orbits of all other planets.

• Jupiter's gravity can alter the orbits of asteroids and comets, potentially sending them into the inner solar system.

• Jupiter's gravity causes all other planets to move closer to the Sun.

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DOK Level 3: Strategic Thinking

What is the primary difference between the formation of terrestrial planets and gas giants?

• Terrestrial planets formed from gas, while gas giants formed from solid particles.

• Terrestrial planets formed closer to the Sun, while gas giants formed farther away.

• Terrestrial planets formed from icy bodies, while gas giants formed from rocky bodies.

• Terrestrial planets formed from the direct collapse of gas clouds, while gas giants formed from planetesimals.

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DOK Level 1: Recall

Analyze how the presence of a protoplanetary disk influences the formation of planets.

• The protoplanetary disk prevents the formation of any planets.

• The protoplanetary disk provides the material needed for planet formation through accretion.

• The protoplanetary disk causes planets to form only in the outer solar system.

• The protoplanetary disk causes planets to form only in the inner solar system.

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DOK Level 2: Skill/Concept

How does the concept of the "frost line" explain the difference in composition between terrestrial planets and gas giants?

• The frost line marks the boundary where temperatures are too high for any planet formation.

• Inside the frost line, only metals and silicates can condense, leading to terrestrial planets; outside the frost line, ices can also condense, leading to gas giants.

• The frost line is irrelevant to planet formation.

• The frost line causes all planets to have the same composition.

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DOK Level 3: Strategic Thinking

What is the primary mechanism by which planetesimals grow into protoplanets?

• Gravitational collapse of gas clouds

• Accretion of smaller particles through collisions and sticking

• Evaporation of icy bodies

• Capture of comets from the Oort Cloud

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DOK Level 1: Recall

Discuss the role of angular momentum in the formation of the solar system.

• Angular momentum caused the solar system to collapse into a single star.

• Angular momentum led to the formation of a rotating protoplanetary disk from which planets formed.

• Angular momentum had no effect on the formation of the solar system.

• Angular momentum caused the planets to form in random orbits.

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DOK Level 2: Skill/Concept

How did the solar wind influence the composition of the inner and outer solar system?

• The solar wind had no influence on the composition of the solar system.

• The solar wind blew away lighter elements from the inner solar system, leaving behind heavier elements to form terrestrial planets.

• The solar wind caused the outer solar system to lose its gas giants.

• The solar wind caused the inner solar system to become rich in ices.

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DOK Level 3: Strategic Thinking