Across
1
Large natural stream of water
4
Flat grassland in tropical regions
5
Where river meets the sea
6
Largest hot desert in the world
7
Height above sea level
12
Area where water covers the soil
Down
2
Cold treeless Arctic plain
3
Dry land with little rainfall
8
Large area covered with trees
9
Region between the two tropic lines
10
Raised area of land, smaller than a mountain
11
Narrow sea inlet between cliffs