Across
1
Flat elevated area of land
5
Imaginary line around the middle of Earth
6
Ridge of rock or coral near the surface
7
Line dividing two countries
8
Flat grassland in tropical regions
Down
2
Dry land with little rainfall
3
Deep narrow valley with steep sides
4
Body of water surrounded by land
8
Largest hot desert in the world
9
Region surrounding the North Pole