It's not that difficult to take a look at Google maps and sit there once in a while and check things out. For instance, while in Texas we spoke about how far it was to drive across Quebec, and a Texan was like, "yeah, but imagine driving across Texas! Our state is huge!" And we politely told him that the province of Quebec is distinctly bigger than Texas, and in fact, many provinces and territories are larger in size than Texas, and he gave us this look like, "if only you knew how large Texas was." Like he was being polite about our "error."
It's just that the geographic questions are illustrative/symptomatic of many individuals never *thinking* with any sort of informed knowledge about other countries. If individuals don't have base knowledge about other places, they impose American values, ideologies and ways of being that simply are not supposed to be there, and it's frustrating to talk to some Americans because of their ability to be so egocentric (because of the way the country is structured--other countries simply can't be so egocentric because of geographical or economical reasons, so those individuals learn more out of necessity).