Across
1
Land surrounded by water on three sides
6
Line dividing two countries
7
Height above sea level
10
Steep rock face at edge of land
11
Mountain that can erupt with lava
12
Flat elevated area of land
Down
2
Region surrounding the North Pole
3
Deep narrow valley with steep sides
4
Large natural stream of water
5
Region between the two tropic lines
8
Chain or group of islands
9
Piece of land jutting into the sea