Across
1
Region surrounding the North Pole
4
Dry land with little rainfall
6
Mountain that can erupt with lava
7
Wearing away of land by water or wind
11
Height above sea level
12
Tool for finding directions
Down
2
Low-lying land surrounded by higher ground
3
Where river meets the sea
5
Half of the Earth
8
Large body of water partly enclosed by land
9
Long-term weather patterns of an area
10
Largest river in South America