Across
1
Total number of people in an area
6
Line dividing two countries
7
Wearing away of land by water or wind
8
Large area covered with trees
9
Height above sea level
10
Vast body of salt water
11
Land surrounded by water
12
Visual representation of an area
Down
2
One of seven major landmasses
3
Raised area of land, smaller than a mountain
4
Flat elevated area of land
5
Chain or group of islands
13
Physical features of land