Across
1
Ocean between Americas and Europe/Africa
2
Flat elevated area of land
6
Largest ocean on Earth
8
Large area covered with trees
9
Where river meets the sea
10
Deep narrow valley with steep sides
12
Steep rock face at edge of land
13
Land surrounded by water
Down
2
Land surrounded by water on three sides
3
Largest river in South America
4
Large slow-moving mass of ice
5
Cold treeless Arctic plain
7
Half of the Earth
11
Chain or group of islands