Across
1
Piece of land jutting into the sea
4
Largest hot desert in the world
5
Flat grassland in tropical regions
6
Raised area of land, smaller than a mountain
7
Where river meets the sea
11
Land surrounded by water on three sides
Down
2
Half of the Earth
3
Mountain that can erupt with lava
8
Cold treeless Arctic plain
9
Distance north or south of equator
10
Deep narrow valley with steep sides