Module 2 Lesson 4

What is the primary characteristic that distinguishes a planet from a dwarf planet?

• A planet is in orbit around the Sun.

• A planet has cleared its orbit of other similar-mass objects.

• A planet is nearly round.

• A planet is terrestrial.

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DOK Level 1: Recall

Which of the following is NOT considered a terrestrial planet?

• Mercury

• Venus

• Jupiter

• Mars

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DOK Level 1: Recall

Identify the celestial body that was formerly classified as an asteroid but is now considered a dwarf planet.

• Pluto

• Eris

• Ceres

• Haumea

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DOK Level 1: Recall

Explain why Jovian planets are significantly larger than terrestrial planets.

• They have a higher density.

• They are composed mostly of gas and ice.

• They are closer to the Sun.

• They have a solid rocky surface.

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DOK Level 2: Skill/Concept

Which of the following best describes the composition of terrestrial planets?

• Gaseous with a rocky core

• Solid rocky surface

• Icy with a gaseous atmosphere

• Liquid surface with a solid core

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DOK Level 1: Recall

Compare the gravitational influence of a planet and a dwarf planet in terms of their ability to clear their orbits.

• Both have the same gravitational influence.

• A planet has a stronger gravitational influence.

• A dwarf planet has a stronger gravitational influence.

• Neither can clear their orbits.

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DOK Level 2: Skill/Concept

What percentage of the solar system's mass is contained within the Sun?

• 50%

• 75%

• 99.8%

• 100%

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DOK Level 1: Recall

Discuss the significance of the term "Earth-like" when referring to terrestrial planets.

• It indicates the planet is the same size as Earth.

• It suggests the planet has a similar atmosphere to Earth.

• It refers to having a solid rocky surface.

• It means the planet is located in the same orbit as Earth.

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DOK Level 2: Skill/Concept

Which of the following is NOT a characteristic of Jovian planets?

• Large size

• Rocky surface

• Composed mostly of gas and ice

• Located in the outer solar system

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DOK Level 1: Recall

Evaluate the role of cosmic debris in the solar system.

• Cosmic debris is irrelevant to the solar system.

• Cosmic debris can impact planets and cause craters.

• Cosmic debris forms the core of terrestrial planets.

• Cosmic debris is only found in the asteroid belt.

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DOK Level 3: Strategic Thinking