Across
1
Flat grassland in tropical regions
5
Low area between mountains
6
Landform where river meets the sea
7
Vast body of salt water
8
Large natural elevation of earth
11
Land surrounded by water
12
Chain or group of islands
13
Height above sea level
Down
2
Region between the two tropic lines
3
Deep narrow valley with steep sides
4
Where river meets the sea
9
Tool for finding directions
10
Raised area of land, smaller than a mountain