Answer the following questions. You will receive immediate feedback when you select your answer or when you click on the green check mark (). When you are finished, click the How Did I Do? button to see your score.

1. How were the Great Lakes formed?
   
   

2. How do lakes such as the Dead Sea form?
   
   

3. Why do heavy concentrations of minerals collect in the Great Salt Lake but not in Lake Superior?
   
   

4. How did Lake Victoria form?
   
   

5. What are two sources of lake water?
   
   

6. Which lake is the largest in the world?
   
   

7. Which lake system contains one-fifth of the world's freshwater supply?
   
   

8. What is usually the main force that removes water from basins that do not have an outlet?
   
   

9. Why don't some lakes have an outlet?
   
   

10. Why aren't all lakes freshwater lakes?