Across
1
Half of the Earth
4
Mountain that can erupt with lava
7
Cold treeless Arctic plain
8
Deep narrow valley with steep sides
10
Line dividing two countries
Down
2
City that is seat of government
3
Visual representation of an area
5
Wearing away of land by water or wind
6
Landform where river meets the sea
9
Total number of people in an area
11
Large area covered with trees