Across
1
Chain or group of islands
6
Area where water covers the soil
7
Flat grassland in tropical regions
8
Largest ocean on Earth
11
Cold treeless Arctic plain
Down
2
Region between the two tropic lines
3
Height above sea level
4
Dry land with little rainfall
5
Where river meets the sea
9
Flat elevated area of land
10
Large slow-moving mass of ice