Across
1
Mountain that can erupt with lava
4
Dry land with little rainfall
5
Area where water covers the soil
9
Largest hot desert in the world
12
Steep rock face at edge of land
Down
2
Line dividing two countries
3
Where river meets the sea
6
Wearing away of land by water or wind
7
Distance north or south of equator
8
Raised area of land, smaller than a mountain
10
Height above sea level
11
Imaginary line around the middle of Earth