Across
1
Mountain that can erupt with lava
4
Wearing away of land by water or wind
8
Largest hot desert in the world
Down
2
Steep rock face at edge of land
3
Large area covered with trees
5
Flat elevated area of land
6
Vast body of salt water
7
Large natural stream of water
9
Cold treeless Arctic plain
10
Low-lying land surrounded by higher ground