Across
1
Height above sea level
5
Region surrounding the North Pole
7
Mountain that can erupt with lava
8
Wearing away of land by water or wind
9
Low area between mountains
10
Large area covered with trees
Down
2
Deep narrow valley with steep sides
3
Region between the two tropic lines
4
Flat elevated area of land
6
Goods sold to another country
11
Line dividing two countries