Across
1
Low-lying land surrounded by higher ground
4
Ocean between Americas and Europe/Africa
5
Area where water covers the soil
7
Region between the two tropic lines
9
Ridge of rock or coral near the surface
Down
2
Deep narrow valley with steep sides
3
Vast body of salt water
6
Land surrounded by water on three sides
8
Mountain that can erupt with lava
10
Height above sea level
11
Land surrounded by water