Across
1
Mountain that can erupt with lava
4
Region surrounding the North Pole
5
Cold treeless Arctic plain
6
Deep narrow valley with steep sides
7
Physical features of land
8
Chain or group of islands
9
Long-term weather patterns of an area
Down
2
Area where water covers the soil
3
Height above sea level
4
Largest river in South America
10
Raised area of land, smaller than a mountain