The plumes that were seen rising from the surface of Triton, Neptune's largest satellite, are believed to be
A) nitrogen gas driven through fissures from beneath the surface by radioactive heat.
B) volcanic ash from eruptions similar to but much smaller than Earthbound eruptions.
C) sulfur dioxide from geysers heated by tidal stresses.
D) water, methane, and ammonia ice crystals above volcanic vents.

Question

Quizplus · Accepted Answer

The plumes on Triton are thought to be nitrogen gas, which is driven through fissures from beneath the surface by the heat generated from radioactive decay. This process is different from volcanic activity involving molten rock or the expulsion of materials like sulfur dioxide or water, methane, and ammonia ice crystals seen on other celestial bodies.

The Plumes That Were Seen Rising from the Surface of Triton