Across
1
Ridge of rock or coral near the surface
4
Height above sea level
5
Cold treeless Arctic plain
7
Flat grassland in tropical regions
9
Large natural elevation of earth
10
Largest river in South America
Down
2
Low area between mountains
3
Narrow sea inlet between cliffs
5
Region between the two tropic lines
6
Distance east or west of prime meridian
8
Goods sold to another country