Across
1
Distance east or west of prime meridian
4
Region surrounding the North Pole
8
Flat grassland in tropical regions
9
Land surrounded by water on three sides
10
Wearing away of land by water or wind
11
Large natural elevation of earth
12
Cold treeless Arctic plain
13
Body of water surrounded by land
Down
2
Height above sea level
3
City that is seat of government
5
Physical features of land
6
Where river meets the sea
7
Low area between mountains