Methane Should Be Rapidly Destroyed in Titan's Atmosphere, Yet It

question 62

Multiple Choice

Methane should be rapidly destroyed in Titan's atmosphere, yet it is still present in appreciable amounts. How can this be?

• A) on the surface of Titan live cows that are constantly producing methane gas
• B) larger hydrocarbons like ethane and propane are being broken down by ultraviolet light into methane
• C) methane may be continually evaporating from the surface and the interior
• D) comet impacts are constantly supplying the atmosphere with fresh methane

---

Definitions:

Prohibited

Forbidden by law, regulation, or other forms of official authority.

Immigrants

Individuals who move from one country to another with the intention of settling in the new country permanently.

Political Efficacy

The belief that one's actions can influence political processes and that participation in politics can bring about change.

American Democracy

A form of government in the United States characterized by a system of representation, rights, and freedoms for its citizens.