Across
1
Land surrounded by water on three sides
6
Area where water covers the soil
7
Ridge of rock or coral near the surface
9
Large natural elevation of earth
10
Wearing away of land by water or wind
11
Largest river in South America
Down
2
Vast body of salt water
3
Tool for finding directions
4
Chain or group of islands
5
Region surrounding the North Pole
8
Half of the Earth