横向
1
Area where water covers the soil
2
Region surrounding the North Pole
5
Large natural stream of water
6
Tool for finding directions
7
Wearing away of land by water or wind
8
Ocean between Americas and Europe/Africa
9
Flat grassland in tropical regions
纵向
2
Height above sea level
3
Physical features of land
4
Where river meets the sea
10
Line dividing two countries
11
City that is seat of government