Across
1
Line dividing two countries
5
Large natural elevation of earth
6
Cold treeless Arctic plain
7
Wearing away of land by water or wind
9
Tool for finding directions
10
Piece of land jutting into the sea
11
Distance east or west of prime meridian
Down
2
Distance north or south of equator
3
Region between the two tropic lines
4
Large slow-moving mass of ice
8
Total number of people in an area
12
Body of water surrounded by land
13
Long-term weather patterns of an area