Antarctica vs. USA

3. Total surface area of land.
7. Large, continuous mass of land.
9. Communities of living organisms interacting with each other and their environment.
13. The quality of being extremely large or extensive.
15. Not suitable or able to be lived in.
16. To compare in order to show differences.
17. Surroundings in which an organism operates.
18. Continent covered in ice at the South Pole.
19. Extent or dimensions of something.

1. The act of searching or traveling for discovery or adventure.
2. Total number of people in a place.
4. System of production, consumption, and distribution of goods and services.
5. The reason for which something is done or created.
6. Study of the physical features of the Earth and its atmosphere.
8. Showing a great deal of variety.
10. research Systematic investigation to establish facts and reach new conclusions.
11. Country in North America.
12. Advancement or development in technology.
14. Average weather conditions of a region.