Across
1
Landform where river meets the sea
4
Low-lying land surrounded by higher ground
6
Seasonal heavy rainfall
7
Ridge of rock or coral near the surface
8
Vast body of salt water
9
Body of water surrounded by land
13
Region near the equator
Down
2
City that is seat of government
3
Land surrounded by water on three sides
5
Cold treeless Arctic plain
10
Imaginary line around the middle of Earth
11
Physical features of land
12
Deep narrow valley with steep sides