Across
1
Large natural stream of water
4
Wearing away of land by water or wind
6
Large body of water partly enclosed by land
7
Long-term weather patterns of an area
9
Where river meets the sea
10
Cold treeless Arctic plain
11
Distance east or west of prime meridian
Down
2
Large area covered with trees
3
Vast body of salt water
5
Chain or group of islands
8
Area where water covers the soil
12
Region surrounding the North Pole