Across
1
Body of water surrounded by land
3
Ocean between Americas and Europe/Africa
4
Narrow sea inlet between cliffs
5
Land surrounded by water on three sides
7
Largest river in South America
9
Flat grassland in tropical regions
Down
2
Total number of people in an area
6
Deep narrow valley with steep sides
8
Region surrounding the North Pole
10
One of seven major landmasses
11
Cold treeless Arctic plain