横向
1
Raised area of land, smaller than a mountain
4
Mountain that can erupt with lava
5
Physical features of land
6
Ridge of rock or coral near the surface
8
Largest river in South America
11
Area where water covers the soil
12
Total number of people in an area
纵向
2
Large natural elevation of earth
3
Flat elevated area of land
7
Line dividing two countries
9
Half of the Earth
10
Land surrounded by water