Across
1
Ridge of rock or coral near the surface
3
Low area between mountains
4
Physical features of land
5
Cold treeless Arctic plain
8
Dry land with little rainfall
9
Large slow-moving mass of ice
10
Vast body of salt water
Down
2
Distance north or south of equator
6
Largest river in South America
7
Goods sold to another country
11
Height above sea level