Southwest United States Geography Quiz
Deserts, water scarcity (10 questions).
Southwest United States Geography Quiz: Quick Study Notes
The American Southwest is defined by its dramatic arid landscapes, rapid urbanization, and the critical challenge of managing scarce water resources in a drying climate.
Key Takeaways
- The Colorado River Compact of 1922 divides water rights among seven basin states.
- Subsidence is a geological hazard caused by over-pumping groundwater.
- The Sonoran Desert is distinct for its bi-seasonal rainfall and Saguaro cacti.
- Phoenix relies on the Central Arizona Project canal system for water delivery.
- Arroyos remain dry most of the year but are dangerous during monsoon season.
Frequently Asked Questions
What are the four main deserts of the Southwest?
The Great Basin, Mojave, Sonoran, and Chihuahuan deserts.
Why is Lake Mead shrinking?
A combination of long-term drought, climate change, and high water demand from agriculture and cities.
Which states are in the Four Corners?
Arizona, New Mexico, Utah, and Colorado.
What is an Arroyo?
A steep-sided gully formed by fast-flowing water in an arid area, usually dry except after heavy rains.
What river borders Texas and Mexico?
The Rio Grande serves as the international border.

GeoQuizzy Editorial Team is a collective of geography educators, researchers, and quiz designers dedicated to creating accurate, engaging, and exam-relevant geography content. The team focuses on physical geography, human geography, maps, landforms, climate, and world regions, transforming core concepts into interactive quizzes that support students, educators, and competitive-exam aspirants. Every quiz published on GeoQuizzy is carefully reviewed for factual accuracy, clarity, and alignment with academic curricula and standardized exams.