Across
1
Landform where river meets the sea
5
Largest hot desert in the world
6
Low-lying land surrounded by higher ground
7
One of seven major landmasses
8
Large area covered with trees
10
Largest river in South America
11
Wearing away of land by water or wind
Down
2
Land surrounded by water
3
Where river meets the sea
4
Body of water surrounded by land
8
Narrow sea inlet between cliffs
9
Vast body of salt water
12
Total number of people in an area