Across
1
Line dividing two countries
4
Region near the equator
6
Wearing away of land by water or wind
7
Seasonal heavy rainfall
8
Large body of water partly enclosed by land
11
Large natural stream of water
Down
1
Low-lying land surrounded by higher ground
2
Area where water covers the soil
3
Large area covered with trees
5
Largest river in South America
9
Land surrounded by water on three sides
10
Large natural elevation of earth