Across
1
Largest ocean on Earth
4
Large natural stream of water
5
Imaginary line around the middle of Earth
7
Ocean between Americas and Europe/Africa
9
Wearing away of land by water or wind
10
Dry land with little rainfall
12
Raised area of land, smaller than a mountain
13
Steep rock face at edge of land
Down
1
Flat elevated area of land
2
Large slow-moving mass of ice
3
Region between the two tropic lines
6
Half of the Earth
8
Narrow sea inlet between cliffs
11
Cold treeless Arctic plain