Across
- 2. largest and longest mountain range
- 6. large lake as salty as any ocean
- 8. mountains that lie just inside California
- 13. about half the land in the United States is used for this
- 15. takes place in mountain regions
- 17. country north of the United States
- 18. causes changes in seasons
- 19. defines the shape of the United States
Down
- 1. this and rivers make up river systems
- 3. climate of a place depends on distance from this
- 4. plain stretching along Atlantic Ocean from Massachusetts to Florida
- 5. climate, water, and landforms are what kind of features
- 7. varies in the United States according to temperature and precipitation
- 9. oldest mountains in the United States
- 10. using less energy to do the same tasks
- 11. next to each other
- 12. 50 states are grouped into 5
- 14. largest lakes in North America
- 16. regions are based on their relative
- 20. this and water affect climate