Across
- 5. one of the longest and highest mountain ranges in the United States; located in eastern California
- 6. the crest dividing North America's major river systems into those flowing eastward and those flowing westward
- 7. coastal islands created from sand desposited by ocean waves and currents in shallow water
- 11. soils deposited by streams and rivers
- 12. the chief mountain system in North America, extending from central New Mexico to N Alaska.
- 15. a series of five lakes between the U.S. and Canada, comprising Lakes Erie, Huron, Michigan, Ontario, and Superior
- 18. a semiarid region E of the Rocky Mountains, in the U.S. and Canada
- 19. an area at or near the foot of a mountain region
Down
- 1. a natural boundary between two landforms regions with different elevations marked by rapids and waterfalls
- 2. Inexspensive paper used mainly for newspaper
- 3. an extensive shoal SE of Newfoundland
- 4. archipelago of eight major islands, several atolls, numerous smaller islets, and undersea seamounts
- 8. low areas of land, often surrounded by mountains
- 9. ocean basin largely surrounded by
- 10. small plants that consist of algae and fungi
- 13. events in the physical environment that can destroy human life and property
- 14. range mountain range extending from N California to W Canada:
- 16. a large inland sea in N Canada.
- 17. place where magma wells up to the surface Earth's mantle