Across
1
Body of water surrounded by land
3
Low-lying land surrounded by higher ground
4
Region surrounding the North Pole
5
One of seven major landmasses
6
Wearing away of land by water or wind
10
Seasonal heavy rainfall
11
Large area covered with trees
Down
2
Largest hot desert in the world
5
Long-term weather patterns of an area
7
Narrow sea inlet between cliffs
8
Deep narrow valley with steep sides
9
Dry land with little rainfall
12
Half of the Earth