Across
1
Vast body of salt water
4
Ridge of rock or coral near the surface
5
Large natural stream of water
6
Dry land with little rainfall
10
Region near the equator
Down
2
Largest hot desert in the world
3
Imaginary line around the middle of Earth
7
Half of the Earth
8
Height above sea level
9
Line dividing two countries
11
Large area covered with trees
12
Deep narrow valley with steep sides