Across
1
Flat grassland in tropical regions
4
Goods sold to another country
5
One of seven major landmasses
6
Largest river in South America
9
Region surrounding the North Pole
10
Region between the two tropic lines
Down
2
Large natural elevation of earth
3
Cold treeless Arctic plain
4
Where river meets the sea
7
Large area covered with trees
8
Vast body of salt water
11
Chain or group of islands