Across
1
Goods sold to another country
3
Low-lying land surrounded by higher ground
5
Tool for finding directions
9
Largest river in South America
10
Distance north or south of equator
11
Land surrounded by water on three sides
12
Line dividing two countries
Down
2
Height above sea level
4
Region near the equator
6
Wearing away of land by water or wind
7
Large natural stream of water
8
Seasonal heavy rainfall