Final answer:
The question "Is the Earth round?" is a question of fact that can be proven with scientific evidence such as satellite images, the observation of ships on the horizon, and the Earth's shadow during a lunar eclipse.
Step-by-step explanation:
The question "Is the Earth round?" is a question of fact because it can be answered definitively with evidence and observation. Unlike questions that involve personal opinions or feelings or that require ideas for action, a question of fact pertains to information that is verifiable and objective. To prove to a member of the "Flat Earth Society" that the Earth is round, we could use a variety of scientific methods and empirical evidence. For instance, we could discuss how pictures from space show the Earth as spherical, how ship masts disappear over the horizon in a manner consistent with a curved surface, and how the Earth casts a round shadow on the Moon during a lunar eclipse.