Piedmont - ANS The area that lies between the Atlantic plain and the Appalachians
Appalachians - ANS The oldest mountain range on the North American continent
Mt. McKinley - ANS The highest mountain in the United States
Rockies - ANS Location of the continental divide where waters flow in different directions
Fall line - ANS The location of rapids and waterfalls located where the higher land of the Piedmont
drops into the Atlantic coastal plain.
Missouri - ANS The longest river in the United States.
Mississippi - ANS The largest river by volume, with its source from Lake Itasca
Minnesota - ANS State from which the Mississippi river begins
Humid subtropical - ANS Climate of the southeast
Super cells - ANS Huge thunderstorms that lead to tornadoes in the Great Plains
Texas and Alaska - ANS 2 states that have the majority of oil in the United States
Coal - ANS Fossil fuel of which the United States has the largest known reserves in the world