Across
1
Imaginary line around the middle of Earth
5
Cold treeless Arctic plain
6
Landform where river meets the sea
7
Seasonal heavy rainfall
8
Deep narrow valley with steep sides
9
Steep rock face at edge of land
10
Raised area of land, smaller than a mountain
11
City that is seat of government
Down
2
Largest river in South America
3
Chain or group of islands
4
Large area covered with trees
5
Region between the two tropic lines
12
Large slow-moving mass of ice