Across
1
Height above sea level
6
Ridge of rock or coral near the surface
7
Low-lying land surrounded by higher ground
8
Dry land with little rainfall
10
Ocean between Americas and Europe/Africa
11
Flat grassland in tropical regions
Down
2
Imaginary line around the middle of Earth
3
Physical features of land
4
Cold treeless Arctic plain
5
Where river meets the sea
9
Steep rock face at edge of land