Across
1
Deep narrow valley with steep sides
4
Largest river in South America
5
Low-lying land surrounded by higher ground
6
Raised area of land, smaller than a mountain
7
Distance north or south of equator
8
Physical features of land
9
Largest hot desert in the world
Down
1
City that is seat of government
2
Cold treeless Arctic plain
3
Mountain that can erupt with lava
10
Region surrounding the North Pole
11
Imaginary line around the middle of Earth