I would not use „Amerika“ if I would refer to the US. I usually mean the geographical combination of North and South America if I would use the term.
If I want to reference the US, I would use „die USA“, „die Vereinigten Staaten“ or in short just „die Staaten“.
Depends on the context. If it is written/talked about in a geographic context, it will usually mean "the Americas". If it's in a political context, it will mean "the USA".
Keep on mind that reputable news outlets won't use "Amerika" when referring to the US however, they will use "Vereinigte Staaten" (United States). "Amerika" as a term for the US is very much a colloquial thing.
Depends on the context. If it is written/talked about in a geographic context, it will usually mean “the Americas”. If it’s in a political context, it will mean “the USA”.
That's a good point.
The US. We'd usually use North/South/Central/Latin America for specifics, or if we wanted to imply something happens all over the Americas, then we'd refer to "the entire American continent" or continental America.
