横向
1
Dry land with little rainfall
3
Visual representation of an area
5
Line dividing two countries
6
Flat elevated area of land
7
Mountain that can erupt with lava
12
Area where water covers the soil
13
Largest river in South America
纵向
2
Physical features of land
4
Imaginary line around the middle of Earth
8
Narrow sea inlet between cliffs
9
Total number of people in an area
10
Vast body of salt water
11
Deep narrow valley with steep sides