Across
1
Flat grassland in tropical regions
3
Large area covered with trees
5
Body of water surrounded by land
6
Wearing away of land by water or wind
9
Distance north or south of equator
10
Vast body of salt water
11
Height above sea level
12
Tool for finding directions
13
Piece of land jutting into the sea
Down
2
Region between the two tropic lines
4
Land surrounded by water on three sides
5
Distance east or west of prime meridian
7
Large natural stream of water
8
Chain or group of islands