Across
1
Land surrounded by water on three sides
6
Wearing away of land by water or wind
9
Region surrounding the North Pole
10
Raised area of land, smaller than a mountain
Down
2
Mountain that can erupt with lava
3
Largest river in South America
4
Height above sea level
5
Piece of land jutting into the sea
6
Where river meets the sea
7
Total number of people in an area
8
Ocean between Americas and Europe/Africa
11
Cold treeless Arctic plain