Across
1
Body of water surrounded by land
2
Low-lying land surrounded by higher ground
5
Low area between mountains
7
Largest river in South America
8
Goods sold to another country
Down
1
Distance north or south of equator
3
Deep narrow valley with steep sides
4
Flat elevated area of land
6
Flat grassland in tropical regions
9
Imaginary line around the middle of Earth