Across
1
Wearing away of land by water or wind
3
Ridge of rock or coral near the surface
5
Large body of water partly enclosed by land
6
Largest river in South America
7
Flat elevated area of land
9
Large natural stream of water
Down
2
Half of the Earth
4
Region between the two tropic lines
5
Large slow-moving mass of ice
8
Deep narrow valley with steep sides