Across
1
Total number of people in an area
6
Flat elevated area of land
8
Where river meets the sea
9
Mountain that can erupt with lava
11
Largest hot desert in the world
12
Low-lying land surrounded by higher ground
Down
2
Steep rock face at edge of land
3
Flat grassland in tropical regions
4
Cold treeless Arctic plain
5
Large area covered with trees
7
One of seven major landmasses
10
Region near the equator
13
Seasonal heavy rainfall