Across
1
Cold treeless Arctic plain
6
Land surrounded by water on three sides
7
Region near the equator
9
Wearing away of land by water or wind
10
Region surrounding the North Pole
11
Vast body of salt water
Down
2
Low-lying land surrounded by higher ground
3
Large natural elevation of earth
4
Imaginary line around the middle of Earth
5
Ocean between Americas and Europe/Africa
8
Line dividing two countries
12
Distance north or south of equator
13
Distance east or west of prime meridian