Across
1
Cold treeless Arctic plain
2
Long-term weather patterns of an area
4
Vast body of salt water
5
Large natural stream of water
6
Wearing away of land by water or wind
Down
2
One of seven major landmasses
3
Low area between mountains
7
Large slow-moving mass of ice
8
Dry land with little rainfall
9
Region surrounding the North Pole
10
Deep narrow valley with steep sides
11
Where river meets the sea
12
Height above sea level