Across
1
Large slow-moving mass of ice
4
Tool for finding directions
5
Long-term weather patterns of an area
11
Largest river in South America
12
Low area between mountains
Down
2
Large area covered with trees
3
Where river meets the sea
6
Total number of people in an area
7
Mountain that can erupt with lava
8
Region surrounding the North Pole
9
Large natural elevation of earth
10
Half of the Earth