US Geography and Regions — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Which body of water do the Mississippi and Missouri rivers both flow into?
A) Pacific Ocean
B) Lake Superior
C) Gulf of Mexico
D) Atlantic Ocean
Both rivers eventually empty into the Gulf of Mexico because the Missouri flows into the Mississippi, which then carries all the water south to the Gulf.
2. A student wants to visit a state with hot deserts and very little rain. Which region should the student visit?
A) Northeast
B) Midwest
C) Southeast
D) Southwest
The Southwest is the best choice because states like Arizona and New Mexico have hot deserts with very little rainfall throughout the year.
3. Which pair of states is located in the Midwest region?
A) Florida and Georgia
B) Iowa and Nebraska
C) Arizona and Nevada
D) Maine and Vermont
Iowa and Nebraska are both in the Midwest, sitting on the Great Plains where farmers grow corn, soybeans, and wheat.
4. Why is the Columbia River important to the West region?
A) It is the border between the US and Canada.
B) It provides water for farming and creates hydroelectric power.
C) It flows through the Grand Canyon.
D) It connects the Great Lakes to the Atlantic Ocean.
The Columbia River is vital because dams on the river generate hydroelectric power, and its water irrigates farmland across Washington and Oregon.
Part B: Fill in the Blank
Write the correct answer on each line.
1. The Missouri River is the longest river in the United States.
The Missouri River stretches about 2,341 miles from Montana to Missouri, making it the longest river in the United States.
2. The Cascade Range and Sierra Nevada are mountain ranges in the West region.
The Sierra Nevada runs through California and Nevada, forming a major mountain range alongside the Cascades in the West region.
3. The Northeast region has many ports where ships can load and unload goods.
The Northeast has many ports along the Atlantic coast, like Boston and New York, where ships dock to load and unload goods for trade.
4. The Sonoran Desert in the Southwest covers parts of Arizona and California.
The Sonoran Desert is a hot, dry desert stretching across parts of Arizona and California, famous for its saguaro cacti and extreme summer heat.
5. Tornadoes are most common in the flat plains states of the Midwest region.
Tornadoes form most often over the flat plains of the Midwest because warm and cold air masses collide easily across the wide-open landscape.