Across
1
Wearing away of land by water or wind
4
Largest ocean on Earth
6
Cold treeless Arctic plain
8
Area where water covers the soil
11
Long-term weather patterns of an area
Down
2
Ocean between Americas and Europe/Africa
3
Land surrounded by water
5
Height above sea level
7
Deep narrow valley with steep sides
9
One of seven major landmasses
10
Region between the two tropic lines