Across
1
Deep narrow valley with steep sides
4
Cold treeless Arctic plain
6
One of seven major landmasses
7
Large slow-moving mass of ice
9
Land surrounded by water on three sides
10
Land surrounded by water
Down
2
Large area covered with trees
3
Area where water covers the soil
5
Region near the equator
5
Region between the two tropic lines
8
Largest river in South America