no
No. You do not become a US citizen by marrying one. That is for you to earn by your own abilities!
Yes, as a Polish citizen, you can travel to Malta using your Polish ID card. Both Poland and Malta are part of the European Union, allowing EU citizens to enter other member states with just an ID card. Ensure your ID is valid for the duration of your stay, and check for any specific entry requirements that may be in place.
If they have a green card, they can work.
A US citizen with a green card can get married to a Switzerland citizen if they have the proper documentation. To do so, you need to go to the office where all marriages are processed and they can tell you which documents specifically you will need.
An international who is married to a US citizen can get his/her green card in the following manner. The US citizen should file in Form I -130 to sponsor the spouse. The Spouse should then file in form I-485 to adjust the status to that of a lawful permanent resident.
5 years 3 years if you are married to a US Citizen
the US citizen shouldn't
No, the Canadian has to be married to the American in order to live or work in America. Because you have to be married to an American to get a green card in order to do that.
If you are married, you can apply for divorce.
Yes.
=An immigrant is NOT an alien.==The immigrant would still be legal because they were married to a US citizen.=