横向
1
Landform where river meets the sea
4
Body of water surrounded by land
5
Physical features of land
7
Seasonal heavy rainfall
9
Largest river in South America
11
Line dividing two countries
12
Total number of people in an area
13
Distance east or west of prime meridian
纵向
1
Dry land with little rainfall
2
Steep rock face at edge of land
3
Flat elevated area of land
6
Mountain that can erupt with lava
8
Land surrounded by water on three sides
10
Deep narrow valley with steep sides