Astronomy Chapter 12 Quiz

The Roche limit is the point at which _______.

the external tidal forces on an object become greater than the internal forces that hold it together.

How many medium-sized moons does Saturn have?

6

The Cassini Division lies between the _______ and _______ rings.

A, B

Helium is more abundant at Saturn than at Jupiter.

False

Saturn is the only planet with a ring system.

False

Why does Saturn radiate even more excess energy than Jupiter?

Helium rain gives off heat as it precipitated toward Saturn's center.

Which of the following played the most important role in the rings' formation.

Saturn's Roche limit

Saturn is less dense than water.

True

Saturn's moon Titan has an atmosphere while the Galilean moons of Jupiter do not.

True

The atmosphere of Saturn is composed mostly of _______.

hydrogen and helium.