Across
1
Land surrounded by water on three sides
5
Ridge of rock or coral near the surface
6
Region between the two tropic lines
7
Deep narrow valley with steep sides
8
Large natural stream of water
9
One of seven major landmasses
10
Large slow-moving mass of ice
Down
1
Largest ocean on Earth
2
Chain or group of islands
3
Wearing away of land by water or wind
4
Largest hot desert in the world
6
Cold treeless Arctic plain
11
Low area between mountains