Across
1
Large natural stream of water
3
Deep narrow valley with steep sides
6
Piece of land jutting into the sea
7
Height above sea level
8
Tool for finding directions
9
Region between the two tropic lines
11
Largest river in South America
Down
2
Largest hot desert in the world
4
Mountain that can erupt with lava
5
Large natural elevation of earth
10
Where river meets the sea