横向
1
Raised area of land, smaller than a mountain
3
Half of the Earth
4
Large natural stream of water
6
Mountain that can erupt with lava
8
Low-lying land surrounded by higher ground
9
Physical features of land
10
Total number of people in an area
纵向
2
Largest ocean on Earth
5
Wearing away of land by water or wind
7
Large natural elevation of earth
11
Vast body of salt water
12
Dry land with little rainfall
13
One of seven major landmasses