横向
1
Largest ocean on Earth
3
Imaginary line around the middle of Earth
4
Land surrounded by water on three sides
5
Goods sold to another country
8
Mountain that can erupt with lava
9
Half of the Earth
10
Largest hot desert in the world
11
Where river meets the sea
纵向
2
Deep narrow valley with steep sides
4
Total number of people in an area
5
Wearing away of land by water or wind
6
Distance north or south of equator
7
Ocean between Americas and Europe/Africa