Across
1
Chain or group of islands
5
Half of the Earth
10
Low-lying land surrounded by higher ground
11
Height above sea level
12
Total number of people in an area
14
Ridge of rock or coral near the surface
Down
2
Largest ocean on Earth
3
Wearing away of land by water or wind
4
Land surrounded by water on three sides
6
Piece of land jutting into the sea
7
Tool for finding directions
8
Large natural stream of water
9
Largest river in South America
13
Dry land with little rainfall