Across
1
Narrow sea inlet between cliffs
3
Largest river in South America
4
Wearing away of land by water or wind
6
Physical features of land
8
Flat grassland in tropical regions
10
Tool for finding directions
Down
2
Deep narrow valley with steep sides
5
Low area between mountains
6
Region between the two tropic lines
7
Vast body of salt water
9
Mountain that can erupt with lava