Across
- 2. Major river that begins in Minnesota and drains into the Gulf of Mexico
- 5. Level or gently rolling land covered with grass
- 7. Destructive column of air spinning at high speeds
- 10. Nickname for Minneapolis and St. Paul
- 11. A resource used in building houses
- 12. River that flows out of Pennsylvania into the Midwest
- 13. Minnesota and Michigan are rich in this resource
Down
- 1. Heavy snowstorm with powerful winds
- 3. Invention that turned the Midwest's rivers into major waterways
- 4. River that begins in Montana and runs east to south through the Dakotas
- 6. The Midwest is the world's biggest producer of this crop
- 8. The Transcontinental one was completed in 1869
- 9. City known as 'Motor City'