Across
1
Deep narrow valley with steep sides
4
Piece of land jutting into the sea
5
Land surrounded by water
6
Chain or group of islands
7
Height above sea level
8
Cold treeless Arctic plain
9
Largest river in South America
10
Region surrounding the North Pole
Down
1
One of seven major landmasses
2
Vast body of salt water
3
Total number of people in an area
11
Narrow sea inlet between cliffs
12
Large slow-moving mass of ice