横向
1
Low-lying land surrounded by higher ground
3
Tool for finding directions
5
Visual representation of an area
6
Landform where river meets the sea
8
Large slow-moving mass of ice
9
Where river meets the sea
11
Area where water covers the soil
纵向
2
Flat grassland in tropical regions
4
Largest river in South America
7
Total number of people in an area
10
Largest hot desert in the world
12
Dry land with little rainfall