Across
1
Line dividing two countries
4
Land surrounded by water on three sides
5
Cold treeless Arctic plain
6
Raised area of land, smaller than a mountain
8
Where river meets the sea
11
Vast body of salt water
Down
2
One of seven major landmasses
3
Large slow-moving mass of ice
7
Large natural stream of water
9
Low-lying land surrounded by higher ground
10
Largest hot desert in the world