Across
1
Region near the equator
1
Region between the two tropic lines
5
Cold treeless Arctic plain
6
Flat grassland in tropical regions
7
Largest river in South America
8
Distance north or south of equator
10
Dry land with little rainfall
Down
2
Imaginary line around the middle of Earth
3
Total number of people in an area
4
Land surrounded by water on three sides
9
Large body of water partly enclosed by land