Across
1
Cold treeless Arctic plain
3
Large natural stream of water
4
Mountain that can erupt with lava
8
Dry land with little rainfall
9
Largest hot desert in the world
11
Seasonal heavy rainfall
12
Flat elevated area of land
13
Largest ocean on Earth
Down
2
Line dividing two countries
5
Ridge of rock or coral near the surface
6
Visual representation of an area
7
Height above sea level
10
Total number of people in an area