Across
1
Where river meets the sea
5
Height above sea level
6
Large natural elevation of earth
7
Body of water surrounded by land
10
Region surrounding the North Pole
11
Cold treeless Arctic plain
12
Line dividing two countries
Down
2
Largest river in South America
3
Large area covered with trees
4
Long-term weather patterns of an area
8
Low area between mountains
9
Physical features of land