Across
1
Ridge of rock or coral near the surface
4
Landform where river meets the sea
5
Imaginary line around the middle of Earth
6
Line dividing two countries
9
Vast body of salt water
12
Flat elevated area of land
Down
2
Wearing away of land by water or wind
3
Narrow sea inlet between cliffs
7
Area where water covers the soil
8
Land surrounded by water on three sides
10
Cold treeless Arctic plain
11
Land surrounded by water