Across
1
Largest river in South America
5
Low-lying land surrounded by higher ground
7
Region near the equator
10
Dry land with little rainfall
Down
2
Line dividing two countries
3
Deep narrow valley with steep sides
4
Distance north or south of equator
6
City that is seat of government
8
Total number of people in an area
9
Seasonal heavy rainfall
11
Region between the two tropic lines