| A | B |
|---|
| What are the names of the 5 Great Lakes | Huron, Ontario, Michigan, Erie, Superior |
| How do the Great Lakes compare to other freshwater lakes? | They are the largest group. |
| What caused the glaciers in North America to melt? | The Earth was getting warmer. |
| What is a waterway? | A system of rivers, lakes, and canals for ships to travel through. |
| Why is it necessary to dig a canal? | To allow ships to travel where there is no natural waterway. |
| Why did engineers change the flow of the Chicago River? | To connect to the Illinois River and the Mississippi River. |
| What waterways make it possible to travel from Lake Erie to Lake Ontario and finally to the Atlantic Ocean? | Welland Ship Canal, St. Lawrence Seaway. |
| Why are barges used in shallow canals? | Flat-bottomed boats can move more easily. |
| What kinds of goods should not be shipped by barge? | Foods that spoil quickly, such as milk, meat, and some fruits and vegetables. |
| What are two major transportation centers in the Midwest? | Chicago, Illinois and St. Louis, Missouri |
| What kinds of information can a line graph display? | Changes that take place over time (Examples: populations, ages, heights, price amounts) |
| What kind of information can bar graphs display? | Numerical comparisons (Example: populations of two cities, hieghts of students, ages) |
| What is a negative effect due to international trade on the waterways of the Midwest? | Zebra mussels from Asia and Europe that can wipe out native species and clog water pipes. |
| What are the Badlands of South Dakota? | An area of dry hills and sharp cliffs of crumbling rock with rich fossil beds. |
| Describe the Badlands during the age of the dinosaur. | Lush, green plains with rivers. The climate was warm and humid. |
| How did the Rocky Monts. and the Black Hills change the climate of the Badlands? | The mountains blocked some of the rain that fell on the region. |
| What two elements cause erosion? | Water and wind. |
| How does erosion help uncover the pre-history of the Badlands? | Water and wind wear away the rock, exposing fossils buried in it. |
| Why do few trees grow in the prairie? | Not enough rain. |
| How does rainfall effect farming? | Farmers in areas with little rain will have to grow crops that require less water. (ex: wheat) |
| Describe the practice of crop rotation. | The planting of different crops in different years. |
| List some products from corn. | cereals, syrup, starch, fuel |
| List some products from soy. | Milk, cheeses, meat substitute. |
| List some products from wheat. | Flour, straw for baskets, metal polish. |
