Across
1
Mountain that can erupt with lava
3
Cold treeless Arctic plain
4
Region surrounding the North Pole
7
Flat grassland in tropical regions
9
Flat elevated area of land
Down
2
Largest hot desert in the world
5
Largest river in South America
6
City that is seat of government
8
Imaginary line around the middle of Earth
10
Tool for finding directions
11
Ocean between Americas and Europe/Africa