| A | B |
|---|
| Prairie | an inland grass area |
| Tornado | a violent windstorm with rotating winds and a funnel-shaped cloud |
| Mississippi River | largest river in the U.S. and Canada in terms of volume and drainage area |
| Blizzard | heavy snowstorm with winds of more than 35 mph |
| Headwaters | the sources of river waters |
| Typhoon | violent tropical storm that forms in the Pacific Ocean |
| Mt. McKinley | North America’s highest mountain |
| Plateau | flat landmass higher than the surrounding land with at least one steep side |
| Basin | broad flat lowland area surrounded by higher land |
| Canadian Shield | a huge area of ancient rock which covers almost half of Canada |
| Continental Divide | a ridge that separates rivers flowing towards opposite sides of a continent |
| Fishery | areas where fish or other sea animals are caught |
| Timberline | elevation above which it is too cold for trees to grow |
| Chinook | seasonal warm wind that blows down the Rocky Mountains in late winter and early spring |
| Death Valley | lowest and hottest place in North America |
| Mesa | flat-topped, elevated landform |
| Great Lakes | the planet’s largest expanse of fresh water |
| Hurricane | a large powerful wind storm that forms over warm ocean waters |
| Tributary | smaller rivers and streams that feed into a larger river |
