Across
1
Where river meets the sea
5
Body of water surrounded by land
6
Total number of people in an area
7
Tool for finding directions
10
Vast body of salt water
Down
2
Cold treeless Arctic plain
3
Land surrounded by water on three sides
4
Largest river in South America
7
Deep narrow valley with steep sides
8
Region near the equator
9
Chain or group of islands
11
Height above sea level