横向
1
Area where water covers the soil
5
Flat elevated area of land
6
Largest ocean on Earth
7
Steep rock face at edge of land
10
Dry land with little rainfall
纵向
2
Cold treeless Arctic plain
3
Distance north or south of equator
4
Total number of people in an area
8
Height above sea level
9
Low area between mountains
11
Where river meets the sea