Across
1
Total number of people in an area
5
Region between the two tropic lines
6
Body of water surrounded by land
11
Deep narrow valley with steep sides
12
Tool for finding directions
Down
2
Land surrounded by water
3
Raised area of land, smaller than a mountain
4
Large area covered with trees
7
Large natural stream of water
8
Mountain that can erupt with lava
9
Largest river in South America
10
Flat elevated area of land