Across
1
Deep narrow valley with steep sides
4
Largest hot desert in the world
5
Area where water covers the soil
7
Region near the equator
8
Large natural stream of water
Down
2
Goods sold to another country
3
Region between the two tropic lines
6
Distance east or west of prime meridian
9
Wearing away of land by water or wind
10
Steep rock face at edge of land
11
Low area between mountains