Across
1
Flat grassland in tropical regions
5
Narrow sea inlet between cliffs
7
Deep narrow valley with steep sides
8
Region between the two tropic lines
10
Low-lying land surrounded by higher ground
11
Piece of land jutting into the sea
12
Half of the Earth
Down
2
Flat elevated area of land
3
Height above sea level
4
Wearing away of land by water or wind
6
Chain or group of islands
9
Large body of water partly enclosed by land
13
Total number of people in an area