Across
1
Largest river in South America
5
Wearing away of land by water or wind
6
Piece of land jutting into the sea
9
Deep narrow valley with steep sides
10
Region between the two tropic lines
Down
2
Low-lying land surrounded by higher ground
3
Flat elevated area of land
4
Seasonal heavy rainfall
6
Long-term weather patterns of an area
7
Large slow-moving mass of ice
8
One of seven major landmasses