Astronomy Quiz

What triggers the initial collapse of the nebular cloud according to the Nebular Theory?

• A nearby supernova explosion
• The rotation of the cloud
• Cooling of the cloud
• Gravitational forces within the cloud

What forms from the remaining material after the sun's formation in the Nebular Theory?

• Asteroids and comets
• Planets and moons
• Black holes
• Stars

What is the role of angular momentum in the Nebular Theory?

• It causes the nebular cloud to expand.
• It prevents the collapse of the cloud.
• It leads to the formation of a rotating disk.
• It slows down the formation of planets.

Why did the inner planets remain small in the Nebular Theory?

• They formed in a region with fewer available materials.
• The outer planets absorbed most of the materials.
• They formed later than the outer planets.
• They were subjected to intense solar winds.

Which of the following best explains why the solar system is relatively flat?

• The nebular cloud was flat to begin with.
• Collisions among particles in the rotating disk caused them to align in a plane.
• The sun's gravity flattened the system.
• The outer planets pulled the system into a flat shape.

Which of the following planets is classified as a terrestrial planet?

• Neptune
• Saturn
• Mars
• Uranus

Which characteristic is most common among Jovian planets?

• Thick atmospheres
• Solid surfaces
• Lack of rings
• Slow rotation speeds

Which of the following is NOT a terrestrial planet?

• Earth
• Venus
• Mars
• Neptune

Which dwarf planet is located in the Kuiper Belt?

• Ceres
• Pluto
• Eris
• Haumea

Which of the following features is typical of terrestrial planets?

• Multiple rings
• High density
• Many moons
• Thick layers of gas