Across
1
Large natural elevation of earth
5
Chain or group of islands
6
City that is seat of government
8
Largest ocean on Earth
9
Cold treeless Arctic plain
Down
2
Deep narrow valley with steep sides
3
Region between the two tropic lines
4
One of seven major landmasses
7
Narrow sea inlet between cliffs
10
Line dividing two countries
11
Tool for finding directions
12
Large slow-moving mass of ice
13
Half of the Earth