Across
1
Largest hot desert in the world
3
Where river meets the sea
5
Vast body of salt water
7
Cold treeless Arctic plain
10
Land surrounded by water on three sides
12
Height above sea level
Down
2
Low-lying land surrounded by higher ground
3
Imaginary line around the middle of Earth
4
Largest river in South America
6
Ridge of rock or coral near the surface
8
Landform where river meets the sea
9
Low area between mountains
11
City that is seat of government