Yes, Mississippi River valley should be capitalized because it is a proper noun referring to a specific geographic region named after the Mississippi River.
Yes, "Mount McKinley" should be capitalized because it is a proper noun referring to a specific mountain. "North America" should be capitalized when referring to the continent, but not when referring to compass directions.
Yes. It should be -- Southeastern North Carolina.
Yes, "River" is capitalized in Mississippi River because it is part of the proper noun.
Yes, the term "California condor" is capitalized because it refers to a specific species of bird, which is the largest land bird in North America.
Yes, it is written North Pole. It is capitalized because it is the name of a place. Names of specific places are proper nouns, which are always capitalized. So North Pole is capitalized just like New Hampshire, South Korea, Sahara Desert or Mississippi River.
Mississippi is bordered by Tennessee to the north.
Mississippi is bordered by Tennessee to the north.
Iowa is north of Mississippi.
Mississippi is bordered by Tennessee to the north.
Mississippi is bordered by Tennessee to the north.
Tennessee is north of the former Mississippi Territory.
Mississippi is bordered by Tennessee to the north.
Mississippi is a U.S. state located in North America.
The North Mississippi Allstars is an American southern rock/blues band from Hernando, Mississippi.
Tennessee is north of the former Mississippi Territory.
Wyoming is farther north than Mississippi.