Across
1
Flat grassland in tropical regions
3
Narrow sea inlet between cliffs
6
Ocean between Americas and Europe/Africa
9
Region surrounding the North Pole
10
Where river meets the sea
11
Largest river in South America
12
Large natural stream of water
Down
2
Wearing away of land by water or wind
4
Tool for finding directions
5
Land surrounded by water on three sides
7
Region near the equator
8
Low area between mountains