Across
1
Dry land with little rainfall
3
Largest ocean on Earth
5
Largest hot desert in the world
6
Deep narrow valley with steep sides
7
Total number of people in an area
8
Line dividing two countries
11
Where river meets the sea
Down
2
Cold treeless Arctic plain
4
Land surrounded by water
9
Large area covered with trees
10
Ocean between Americas and Europe/Africa