Across
- 2. urban _______ is the rapid and uncontrolled expansion of cities and urban areas
- 4. a series of the largest freshwater lakes on Earth located between the United States and Canada
- 6. the second longest river in North America running from Minnesota to the Gulf of Mexico
- 10. the oldest mountain chain in North America
- 11. subsurface layer of soil that remains frozen throughout the year
- 12. a marshy tract of land in Florida that is mostly under water and covered with tall grasses
Down
- 1. a broad expanse of mostly flat grassland east of the Rocky Mountains
- 3. the __________ divide is a boundary that separates a continent's river systems
- 5. the former land bridge between Siberia (Russia) and Alaska
- 7. prevailing _________ are the west to east winds that occur in the temperate middle latitude
- 8. ________ resources are substances like minerals, forests, water, and land that can be used for economic gain
- 9. Located off the coast of Canada, the largest island in the World.