Across
1
Wearing away of land by water or wind
3
Largest ocean on Earth
6
Ridge of rock or coral near the surface
9
Vast body of salt water
10
Body of water surrounded by land
11
Seasonal heavy rainfall
12
Landform where river meets the sea
13
Largest river in South America
Down
2
Flat grassland in tropical regions
4
Dry land with little rainfall
5
Narrow sea inlet between cliffs
7
Ocean between Americas and Europe/Africa
8
Imaginary line around the middle of Earth