Across
1
Cold treeless Arctic plain
4
Land surrounded by water
5
Vast body of salt water
7
Largest hot desert in the world
9
Steep rock face at edge of land
10
Imaginary line around the middle of Earth
13
Large body of water partly enclosed by land
Down
1
Region between the two tropic lines
2
Wearing away of land by water or wind
3
Large natural stream of water
6
Seasonal heavy rainfall
8
Distance north or south of equator
11
Half of the Earth
12
Distance east or west of prime meridian