Across
1
Low-lying land surrounded by higher ground
4
Largest river in South America
5
Body of water surrounded by land
8
Mountain that can erupt with lava
10
Vast body of salt water
Down
2
Land surrounded by water
3
City that is seat of government
6
One of seven major landmasses
7
Region surrounding the North Pole
9
Landform where river meets the sea
11
Land surrounded by water on three sides