Across
1
Low-lying land surrounded by higher ground
4
Long-term weather patterns of an area
6
Land surrounded by water on three sides
8
Narrow sea inlet between cliffs
10
Imaginary line around the middle of Earth
11
Flat grassland in tropical regions
12
Region between the two tropic lines
Down
2
Where river meets the sea
3
Land surrounded by water
4
Steep rock face at edge of land
5
Total number of people in an area
7
Flat elevated area of land
9
Large natural elevation of earth