Two subjects sharing one name
Physical geography is about the planet: where the water is, how the land is shaped, which ranges run where. Political geography is about people: borders, capitals, populations, the names we have agreed on. They are taught together and they behave completely differently, because one of them changes and the other does not.
This quiz alternates between them. A question about a river can be followed immediately by one about a seat of government, and the two draw on unrelated parts of what you know.