| A | B |
|---|
| The Great Lakes | created by the Ice Age |
| a canal | is a waterway dug across land for ships to go through |
| St. Lawrence Seaway and St. Lawrence Riveer | connects the Great Lakes with the Atlantic Ocean |
| Engineers changed the flow of the Chicago River | to connect Lake Michigan with the Mississippi |
| a barge | is a flat bottomed boat |
| advantage of shipping by a barge | costs less |
| badlands millions of years ago | had rivers flowing through lush, green plain |
| Badlands became cooler | because mountain ranges rose |
| erosion | water and wind wearing away rock |
| on a prairie | grass, sheep, cattle |
| Midwest is an important agriculture region | long growing season, warm summer, and deep, rich soil |
| Corn Belt | called this because there is enough rain so corn grows well here |
| main crops in Midwest | corn, soybeans, wheat |
| Irrigation | helps farmers bring water to their crops |
| Wisconsin | known for milk and dairy products |
