Across
1
Where river meets the sea
4
Ridge of rock or coral near the surface
7
Total number of people in an area
8
Largest ocean on Earth
9
Line dividing two countries
Down
2
Large slow-moving mass of ice
3
Half of the Earth
5
Area where water covers the soil
6
Narrow sea inlet between cliffs
10
Seasonal heavy rainfall
11
Ocean between Americas and Europe/Africa
12
Flat elevated area of land
13
Low-lying land surrounded by higher ground