Explain why the U. S. acquisitions of new territory grew so rapidly during this time period.

during this time the US acquired  Alaska, Hawaii, Puerto rico, Guam, and the Philippians. During this time the us was a rising military power, and many European countries no longer wanted their territory in the western hemisphere. The US was also growing as an economic superpower witch allowed them to purchase land from places like Russia.  

its a map of something

basic principles: federalism, separation of powers, checks and balances, judicial review, representative democracy, limited government, rule of law, individual rights and responsibilities, consent of the governed, majority rule, popular sovereignty, equal protection.