Across
1
Largest hot desert in the world
4
Land surrounded by water on three sides
5
Deep narrow valley with steep sides
6
Cold treeless Arctic plain
7
Goods sold to another country
11
Imaginary line around the middle of Earth
Down
2
Wearing away of land by water or wind
3
Low area between mountains
4
Flat elevated area of land
8
Seasonal heavy rainfall
9
Dry land with little rainfall
10
Large natural elevation of earth
12
Height above sea level