Across
1
Low area between mountains
3
Large natural elevation of earth
4
Narrow sea inlet between cliffs
6
Chain or group of islands
7
Deep narrow valley with steep sides
10
Large body of water partly enclosed by land
11
Cold treeless Arctic plain
12
Wearing away of land by water or wind
Down
2
Physical features of land
5
Ridge of rock or coral near the surface
6
Region surrounding the North Pole
8
Mountain that can erupt with lava
9
Land surrounded by water on three sides