Across
1
Large natural stream of water
2
Region surrounding the North Pole
4
Dry land with little rainfall
5
Wearing away of land by water or wind
9
Largest river in South America
10
Piece of land jutting into the sea
11
Flat grassland in tropical regions
12
Distance north or south of equator
Down
2
Ocean between Americas and Europe/Africa
3
Line dividing two countries
6
Land surrounded by water
7
Height above sea level
8
One of seven major landmasses
13
Area where water covers the soil