Across
- 3. major mountain chain in the eastern United States and Canada
- 7. runs almost the length of the United States. It is part of the continent’s longest and busiest river system.
- 9. line of the highest points in the Rockies that marks the separation between rivers flowing to the east and to the west
- 10. the southern boundary of the United States.
Down
- 1. five large lakes found in the central United States and Canada
- 2. are divided into three subregions—the Interior Plains, the Great Plains, and the Canadian Shield.
- 4. mountain chain in the western United States and Canada
- 5. largely treeless area in the interior lowlands
- 6. rocky, flat area that surrounds Hudson Bay
- 8. Canada’s longest river
