Where does Titan's thick,nitrogen-rich atmosphere (see the image below)come from?
A) Photodissociation of methane in its atmosphere
B) Frequent volcanic eruptions
C) It has been deposited by cometary impacts over the age of the Solar System
D) Photosynthesis of algae in oceans that lie beneath its icy surface

Question

Where does Titan's thick,nitrogen-rich atmosphere (see the image below)come from? 
A) Photodissociation of methane in its atmosphere 
B) Frequent volcanic eruptions 
C) It has been deposited by cometary impacts over the age of the Solar System 
D) Photosynthesis of algae in oceans that lie beneath its icy surface

Quizplus · Accepted Answer

Titan's atmosphere is primarily composed of nitrogen with small amounts of methane. The methane is constantly broken down by sunlight and recombines with other molecules to form longer hydrocarbons, which eventually fall to the surface or form haze particles in the atmosphere. This process, known as photodissociation, is what creates Titan's thick, nitrogen-rich atmosphere.

Where Does Titan's Thick,nitrogen-Rich Atmosphere (See the Image Below)come From