Across
1
Largest hot desert in the world
4
Goods sold to another country
5
Cold treeless Arctic plain
8
Wearing away of land by water or wind
9
Distance north or south of equator
10
Vast body of salt water
11
Mountain that can erupt with lava
Down
2
Area where water covers the soil
3
Flat grassland in tropical regions
6
Height above sea level
7
Large natural stream of water