横向
1
Tool for finding directions
6
Mountain that can erupt with lava
7
Largest river in South America
10
Dry land with little rainfall
纵向
2
Visual representation of an area
3
Vast body of salt water
4
Imaginary line around the middle of Earth
5
Low-lying land surrounded by higher ground
8
Flat grassland in tropical regions
9
Largest ocean on Earth