Across
1
Low-lying land surrounded by higher ground
4
Imaginary line around the middle of Earth
6
Seasonal heavy rainfall
9
Ridge of rock or coral near the surface
10
Large natural stream of water
Down
2
City that is seat of government
3
Raised area of land, smaller than a mountain
5
Large area covered with trees
7
Where river meets the sea
8
Vast body of salt water