Across
1
Largest river in South America
3
Steep rock face at edge of land
4
Total number of people in an area
7
Body of water surrounded by land
8
Large body of water partly enclosed by land
9
Wearing away of land by water or wind
10
Land surrounded by water
11
Imaginary line around the middle of Earth
12
Mountain that can erupt with lava
Down
1
Chain or group of islands
2
Narrow sea inlet between cliffs
5
Raised area of land, smaller than a mountain
6
Land surrounded by water on three sides