3. Solar System

Planetary Formation — Quiz

Test your understanding of planetary formation with 5 practice questions.

Practice Questions

Question 1

Which of the following best describes the 'gravitational instability' model of gas giant planet formation?

Question 2

What is the primary mechanism by which a protoplanetary disk loses angular momentum, allowing material to accrete onto the central star?

Question 3

Observations of 'hot Jupiters' (gas giant planets orbiting very close to their stars) provide strong evidence for which of the following processes?

Question 4

If a protoplanetary disk has a surface density profile described by $ \Sigma(r) = \Sigma_0 \left( \frac{r}{r_0} \right)^{-1.5} $, where $ \Sigma $ is the surface density and $ r $ is the radial distance from the star, how does the local gas surface density experienced by a planet change if it migrates from $ 1 \text{ AU} $ to $ 0.1 \text{ AU} $?

Question 5

Which of the following is a direct piece of evidence from meteoritics that supports the rapid formation of planetesimals in the early solar system?