Across
1
Narrow sea inlet between cliffs
4
Where river meets the sea
5
Mountain that can erupt with lava
7
Raised area of land, smaller than a mountain
8
Flat grassland in tropical regions
9
Deep narrow valley with steep sides
10
Wearing away of land by water or wind
11
Total number of people in an area
Down
2
Region surrounding the North Pole
3
Large body of water partly enclosed by land
5
Low area between mountains
6
Large natural stream of water
12
Imaginary line around the middle of Earth