Across
1
Height above sea level
5
Largest hot desert in the world
7
Deep narrow valley with steep sides
8
Ridge of rock or coral near the surface
9
Large body of water partly enclosed by land
10
Large natural stream of water
11
Raised area of land, smaller than a mountain
12
Tool for finding directions
Down
2
Half of the Earth
3
Line dividing two countries
4
Visual representation of an area
6
Low area between mountains
9
Large slow-moving mass of ice