Across
1
Low-lying land surrounded by higher ground
4
Body of water surrounded by land
5
Area where water covers the soil
6
Deep narrow valley with steep sides
7
Wearing away of land by water or wind
9
Distance north or south of equator
Down
2
Chain or group of islands
3
Land surrounded by water on three sides
8
Narrow sea inlet between cliffs
10
Where river meets the sea