Across
1
Largest ocean on Earth
3
Largest river in South America
5
Landform where river meets the sea
6
Largest hot desert in the world
9
Large slow-moving mass of ice
10
Low area between mountains
11
Distance north or south of equator
Down
1
Land surrounded by water on three sides
2
Chain or group of islands
4
Low-lying land surrounded by higher ground
7
Cold treeless Arctic plain
8
Large area covered with trees
12
Region between the two tropic lines
13
Flat grassland in tropical regions