横向
1
Vast body of salt water
4
Height above sea level
5
Largest river in South America
7
Visual representation of an area
10
Land surrounded by water
11
Cold treeless Arctic plain
纵向
2
Line dividing two countries
3
Largest hot desert in the world
6
Landform where river meets the sea
8
Largest ocean on Earth
9
Total number of people in an area