Across
1
Cold treeless Arctic plain
3
Raised area of land, smaller than a mountain
5
Land surrounded by water on three sides
6
City that is seat of government
7
Mountain that can erupt with lava
10
Line dividing two countries
13
Largest ocean on Earth
Down
1
Region between the two tropic lines
2
Largest hot desert in the world
4
Largest river in South America
8
Imaginary line around the middle of Earth
9
Landform where river meets the sea
11
Goods sold to another country
12
Total number of people in an area