横向
1
Large body of water partly enclosed by land
3
Largest river in South America
4
Landform where river meets the sea
5
Physical features of land
6
Seasonal heavy rainfall
9
Tool for finding directions
纵向
2
Total number of people in an area
7
Flat grassland in tropical regions
8
Cold treeless Arctic plain
10
Area where water covers the soil
11
Imaginary line around the middle of Earth