Across
1
Large body of water partly enclosed by land
3
Piece of land jutting into the sea
4
Region surrounding the North Pole
5
Wearing away of land by water or wind
6
Deep narrow valley with steep sides
7
Distance east or west of prime meridian
8
Large area covered with trees
10
Land surrounded by water
11
Region near the equator
12
Cold treeless Arctic plain
Down
2
Chain or group of islands
4
Ocean between Americas and Europe/Africa
9
Body of water surrounded by land
13
Largest ocean on Earth