Across
1
Cold treeless Arctic plain
5
Chain or group of islands
6
Imaginary line around the middle of Earth
7
Where river meets the sea
Down
2
Ridge of rock or coral near the surface
3
Low-lying land surrounded by higher ground
4
Flat elevated area of land
8
Piece of land jutting into the sea
9
Area where water covers the soil
10
Low area between mountains
11
Distance east or west of prime meridian