Across
1
Dry land with little rainfall
4
Largest river in South America
6
Region surrounding the North Pole
7
Low-lying land surrounded by higher ground
9
Large body of water partly enclosed by land
Down
2
Total number of people in an area
3
Large area covered with trees
5
Land surrounded by water on three sides
8
Area where water covers the soil
10
Large natural stream of water
11
Largest ocean on Earth