Across
1
Line dividing two countries
3
City that is seat of government
4
Total number of people in an area
9
Height above sea level
10
Ridge of rock or coral near the surface
12
Wearing away of land by water or wind
13
Mountain that can erupt with lava
14
Steep rock face at edge of land
15
Large natural stream of water
Down
2
Cold treeless Arctic plain
5
Land surrounded by water on three sides
6
Region near the equator
7
Large slow-moving mass of ice
8
Landform where river meets the sea
11
Vast body of salt water