Across
1
Low area between mountains
4
Line dividing two countries
6
Land surrounded by water on three sides
7
Deep narrow valley with steep sides
8
Ocean between Americas and Europe/Africa
9
Total number of people in an area
10
Large natural elevation of earth
11
One of seven major landmasses
Down
2
Chain or group of islands
3
Where river meets the sea
5
City that is seat of government