横向
1
One of seven major landmasses
6
Vast body of salt water
7
Largest river in South America
9
Line dividing two countries
10
Large natural stream of water
12
Tool for finding directions
纵向
2
Large slow-moving mass of ice
3
Land surrounded by water
4
Mountain that can erupt with lava
5
Seasonal heavy rainfall
8
Wearing away of land by water or wind
11
Largest ocean on Earth
13
Height above sea level