Across
1
Largest river in South America
5
Land surrounded by water
6
Deep narrow valley with steep sides
7
Mountain that can erupt with lava
8
Low area between mountains
9
Vast body of salt water
Down
2
Imaginary line around the middle of Earth
3
Low-lying land surrounded by higher ground
4
Total number of people in an area
10
Goods brought in from another country
11
Goods sold to another country