1. Which U.S. state is the Grand Canyon located in?

2. Which country has the largest population in the world?

3. What is the capital city of Argentina?

4. What river runs through the city of Paris?

5. Why does NASA use the Atacama Desert for testing Mars rovers?

6. What does it mean that Kilimanjaro is a 'free-standing' mountain?

7. What is the primary criteria used by geographers to classify Antarctica as a desert?

8. Which peak is the highest in the entire Alpine mountain system?

9. What term describes the Baltic Sea's unique mixture of fresh and salt water?

10. The North Sea is a major global producer of which two natural resources?

11. Victoria Falls, one of the Seven Natural Wonders of the World, is located on which river?

12. Which small country is located entirely within the Pyrenees mountain range?

13. What is the highest peak in the Atlas Mountains?

14. Ancient Silk Road traders avoided the Taklamakan Desert by doing what?

15. The Caribbean Sea contains approximately what percentage of the world's coral reefs?

16. What is the highest mountain in the Great Dividing Range and on mainland Australia?

17. Which cold ocean current is responsible for the fog that sustains life in the Namib Desert?

18. Which iconic plant species is used as an indicator to define the boundaries of the Mojave Desert?

19. The Danakil Depression is located at the intersection of how many tectonic plates?

20. In which body of water does the Niger River terminate?