Across
1
Height above sea level
4
Line dividing two countries
5
Dry land with little rainfall
6
Narrow sea inlet between cliffs
8
One of seven major landmasses
10
Total number of people in an area
12
Body of water surrounded by land
Down
2
Tool for finding directions
3
Ridge of rock or coral near the surface
7
Vast body of salt water
9
Land surrounded by water
11
Region near the equator
13
Piece of land jutting into the sea