Across
1
Landform where river meets the sea
4
Large natural elevation of earth
6
Low area between mountains
7
Goods sold to another country
9
Mountain that can erupt with lava
10
Piece of land jutting into the sea
11
Flat grassland in tropical regions
Down
2
Flat elevated area of land
3
Largest river in South America
4
Seasonal heavy rainfall
5
Where river meets the sea
7
Wearing away of land by water or wind
8
Deep narrow valley with steep sides